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Preventing damage to health and accidents
Preventing damage to the product and malfunctions
Safety instructions for Lithium rechargeable batteries
If abused or misused, rechargeable batteries may leak. In extreme cases, they may even present a risk of:
![]() | Only use rechargeable batteries and chargers recommended by Sonova Consumer Hearing. |
![]() | Do not leave the product / rechargeable batteries unattended while charging. |
![]() | Only charge the product / rechargeable batteries at ambient temperatures between 10°C and 40°C/50°F and 104°F and do not charge them near easily flammable objects. |
![]() | Do not heat the product / rechargeable batteries above 70°C/158°F. Avoid exposure to sunlight and do not throw the product / rechargeable batteries into fire. |
![]() | Switch rechargeable battery-powered products off after use. |
![]() | When not using the product / rechargeable batteries for extended periods of time, charge them regularly (about every three months). |
![]() | This product contains coin rechargeable batteries. If you think the product / a coin rechargeable battery has been swallowed or is lodged in the body, seek medical assistance immediately. |
![]() | Avoid prolonged skin contact with the product, rechargeable battery, charger or charging cable when connected to a power source. These components can heat up during charging and cause skin irritation. |
![]() | Dispose of defective products with built-in rechargeable batteries at special collection points or return them to your specialist dealer to facilitate recycling. |
The earbuds feature an IP54 ingress protection rating which means they are protected from the ingress of dust and water (according to the International Protection Rating (IP code), IEC standard 60529, tested under laboratory conditions).
The earbuds can be used at the beach in sandy/dusty conditions and in rain, for example. However, they are not suitable for immersion in water or for wearing in the shower. In case of permanent moisture/ wetness, the ingress protection can be reduced and the product can be damaged.
Do not charge wet earbuds. Completely dry wet earbuds with a dry cloth before charging them.
The charging case is not splash waterproof. Always keep the charging case dry.
This product stores individual settings such as the volume and the Bluetooth addresses of paired devices. This data is required for the operation of the product and is not transferred to Sonova Consumer Hearing GmbH or companies commissioned by Sonova Consumer Hearing GmbH and is not processed.
Using the "Sennheiser Smart Control" app, you can update the firmware of the product for free via an Internet connection. If the device on which the app is installed is connected to the Internet, the following data is automatically transferred to and processed by Sonova Consumer Hearing servers in order to provide and transfer suitable firmware updates: hardware identifier, hardware revision number, firmware version of the product, operating system type (Android, iOS) and version, version of the app. The data is only used for the purpose of providing and transferring the firmware updates and is not stored permanently.
If you do not want this data to be transferred and processed, do not connect to the Internet.
These headphones have been designed as an accessory for Bluetooth compliant devices. They are intended for wireless audio communication such as music playback and phone calls via Bluetooth wireless technology.
It is considered improper use when the product is used for any application not named in the corresponding product documentation.
Sonova Consumer Hearing GmbH does not accept liability for damage arising from misuse or improper use of this product and its attachments/accessories.
Sonova Consumer Hearing GmbH is not liable for damages to USB devices that are not consistent with the USB specifications. Sonova Consumer Hearing GmbH is not liable for damages resulting from the loss of connection due to flat or overaged rechargeable batteries or exceeding the Bluetooth transmission range.
Before putting into operation, please observe the respective country-specific regulations.
Online you can find:
Model: CX200TW1 C
Model: CX200TW1 R and CX200TW1 L
When a USB cable is connected, the LED of the charging case permanently displays the charging process:
LED | Charging case WITH earbuds inserted | Charging case WITHOUT earbuds inserted | |
![]() | pulses yellow | ... earbuds and charging case are being charged | ... charging case is being charged |
![]() | lights up green | ... earbuds and charging case are fully charged | ... charging case is fully charged |
![]() | flashes red | ... charging error/ battery error | ... charging error/ battery error |
If you open the lid of the charging case and no USB cable is connected, the LED of the charging case displays the battery charge status or the charging process of the earbuds. If you close the lid of the charging case, the LED will go off after approx. 30 seconds.
LED | Charging case WITH earbuds inserted | Charging case WITHOUT earbuds inserted | |
![]() | lights up green | ... earbuds are fully charged and the charging case can still charge at least one complete cycle | ... charging case is fully charged |
![]() | pulses yellow | ... earbuds are being charged via the rechargeable battery of the charging case | – |
![]() | lights up yellow | ... earbuds are fully charged, the charging case cannot charge another complete cycle | ... charging case is charged less than 90% |
![]() | lights up red | ... rechargeable batteries of the earbuds and the charging case are almost empty | ... rechargeable battery of the charging case is almost empty |
![]() | flashes red | ... charging error/ battery error | ... charging error/ battery error |
If the LED does not light up:
If you close the lid of the charging case, the LED will go off after approx. 5 minutes.
LED | Meaning; the earbuds... | |
![]() | flashes red-blue for approx. 1 minute | ... are in Bluetooth pairing mode |
![]() | flashes blue 3x | ... Bluetooth pairing or earbud pairing successful |
![]() | flashes red 3x | ... Bluetooth pairing or earbud pairing failed |
![]() | lights up blue | ... are connected to a device via Bluetooth |
![]() | lights up red | ... are not connected to a device via Bluetooth or the connection has been lost |
![]() | flashes red quickly | ... rechargeable battery is almost empty |
![]() | flashes red slowly | ... system error – perform a reset |
![]() | flashes redgreen for approx. 1 minute | ... are in earbud pairing mode (to pair the right and the left earbud) |
The earbuds output voice prompts for events (the table gives some examples). Using the Smart Control app, you can change the language of the voice prompts, choose between voice prompts and beep sounds, or deactivate the status messages with a few exceptions (e.g. rechargeable battery is empty).
Voice prompt | Meaning/earbuds... |
"Power on" | ... are switched on |
"Power off" | ... switch off |
"Connected" | ... connected via Bluetooth |
"No connection" | ... not connected via Bluetooth |
"Pairing" | ... in Bluetooth pairing mode |
"Pairing successful" | ... Bluetooth pairing successful |
"Pairing failed" | ... Bluetooth pairing not successful |
"Recharge headset" | ... Rechargeable battery is almost empty. Recharge the rechargeable battery. |
"Call rejected" | ... incoming call rejected |
"Call ended" | ... call ended |
Upon delivery, the rechargeable batteries of the earbuds and the charging case are in sleep mode and have to be woken up by connecting them to a power source once.
The perceived sound quality including bass performance for the "Adaptable Acoustics" feature of the SPORT True Wireless depends to a large extent on the correct fit of the earbuds in the ear. Earbuds that fit perfectly in your ears do not fall out even during fast movements and, especially for "Focus" mode, the best possible noise cancellation is ensured. Therefore, you can choose between ear adapters and ear fins in different sizes.
Open ear adapters for "Aware" mode
Use the open ear adapters (with blue marking inside) for "Aware" mode, for example to reduce body borne noise when running (breathing, footsteps, clothes rattling) and to be more aware of high sounds from your surroundings (car horn, bike bell, barking dog).
Closed ear adapters for "Focus" mode
Use the closed ear adapters (with a black cross inside) for "Focus" mode to minimize your awareness of your surroundings and to fully immerse yourself in your favorite music, for example, when working out at the gym or at home.
Proceed as follows:
Connect the earbuds to your smartphone via Bluetooth.
The Sennheiser Smart Control app allows you to use all functions and settings of the earbuds, to set the "Adaptable Acoustics" feature to match the ear adapters used (open or closed) and to e.g. adjust the sound to your liking using the equalizer.
The earbuds and the charging case each have a built-in rechargeable battery. The charging case allows you to store the earbuds safely at all times while on the go, and they are being charged at the same time.
Upon delivery, the reachargeable batteries of the earbuds and the charging case are in sleep mode. Remove the protective foil on the charging contacts of the earbuds and connect the charging case to a USB power source to exit sleep mode.
A complete charging cycle of the charging case and the earbuds takes about 1.5 hours. The quick charge function gives you approx. 1 hour of playback time after 10 minutes of charging. The charging time can vary depending on the power source used and the ambient temperature.
We recommend charging the earbuds and the charging case for a complete charging cycle without interruption before using for the first time.
We recommend using the supplied USB cable and a compatible standard USB power supply for charging the headphones.
When a USB cable connected to a power source is also connected to the charging case, the rechargeable battery of the charging case is being charged. When the earbuds are inserted into the charging case, their rechargeable batteries are being charged at the same time. The LED of the charging case displays the charge status.
When the battery charge of the earbuds drops to a critical level, a voice prompt asks you to recharge the earbuds ("Recharge headset").
The charge status of the rechargeable battery of the charging case is displayed by the LED on the charging case.
At the end of its operational lifetime, this product with its built-in rechargeable battery must be disposed of separately from normal household waste.
LED | Charging case WITH earbuds inserted | Charging case WITHOUT earbuds inserted | |
![]() | pulses yellow | ... earbuds and charging case are being charged | ... charging case is being charged |
![]() | lights up green | ... earbuds and charging case are fully charged | ... charging case is fully charged |
![]() | flashes red | ... charging error/ battery error | ... charging error/ battery error |
If the LED does not light up:
To be able to use the Bluetooth wireless connection, you must register both devices (earbuds and e.g. smartphone) via the device settings of your smartphone. This process is called pairing.
If operation differs from the steps mentioned, also refer to the instruction manual of the Bluetooth device you are using.
When you switch on the earbuds for the first time after initial charging, they automatically switch to Bluetooth pairing mode.
The earbuds are compatible with Bluetooth 5.2.
If your audio source supports one of the following high-resolution audio encoding methods, music is automatically played in high audio quality: aptX® or AAC. Otherwise the headphones will play your music in normal audio quality (SBC).
Paired devices establish the Bluetooth wireless connection immediately after switch-on and are ready for use.
When you switch on the earbuds, they automatically try to connect to the last connected Bluetooth device. The earbuds can save the connection profiles of up to eight Bluetooth devices with which they have been paired. Audio playback is only possible from one device at a time.
If you pair the earbuds with the ninth Bluetooth device, the saved connection profile of the least used Bluetooth device will be overwritten. If you want to re-establish a connection with the overwritten Bluetooth device, you have to pair the earbuds again.
Using the Smart Control app, you can view the list of paired devices and selectively connect and disconnect devices ("Connections").
![]() | Paired and connected Bluetooth device |
![]() | Paired Bluetooth device (currently not connected) |
The right and the left earbud also use a Bluetooth wireless connection. Both earbuds are paired with each other upon delivery. If you are using a different earbud (e.g. a spare earbud), the two earbuds must also be paired with each other.
The Bluetooth device name "SPORT True Wireless" can be changed individually using the Smart Control app.
If no connection is established within 1 minute, pairing mode is terminated and the earbuds switch to idle mode. If necessary, repeat the steps described above.
If the earbuds are not paired with any Bluetooth device (the pairing list is empty), pairing mode is permanently active.
To selectively switch the audio connection to paired Bluetooth devices using the "Connections" function, you require the Smart Control app.
Using the "Connections" function, you can also selectively delete pairing information of devices without resetting the earbuds to the factory default settings.
Using the "Connections" function in the Smart Control app, you can also selectively connect the earbuds to paired devices without terminating an existing connection or deleting the pairing information of certain devices.
If you want to clear the Bluetooth pairing list of the earbuds, use the Smart Control app or reset the earbuds to the factory default settings.
The right and the left earbud are paired with each other upon delivery. If, however, you are using a different earbud (e.g. a spare earbud), you have to pair the two earbuds with each other once. This pairing process resets the earbuds to the factory default settings.
To make full use of all the settings and functions of the headphones, you need to have the free Sennheiser Smart Control app installed on your smartphone.
Download the app from the Apple App Store or Google Play and install it on your smartphone. Alternatively, you can use your smartphone to scan the following QR code or to call up the following Internet site:
www.sennheiser-hearing.com/smartcontrol
The perceived sound quality including bass performance for the "Adaptable Acoustics" feature of the SPORT True Wireless depends to a large extent on the correct fit of the earbuds in the ear. Earbuds that fit perfectly in your ears do not fall out even during fast movements and, especially for "Focus" mode, the best possible noise cancellation is ensured.
Closed ear adapters for "Focus" mode
Use the closed ear adapters (with a black cross inside) for "Focus" mode to minimize your awareness of your surroundings and to fully immerse yourself in your favorite music, for example, when working out at the gym or at home.
Open ear adapters for "Aware" mode
Use the open ear adapters (with blue marking inside) for "Aware" mode, for example to reduce body borne noise when running (breathing, footsteps, cloths rattling) and to be more aware of high sounds from your surroundings (car horn, bike bell, barking dog).
Silicone ear fins
Using the "Adaptable Acoustics" feature in Smart Control app and the open or closed ear adapters, you can optimally adapt the SPORT True Wireless to your application.
Note that both earbuds must be switched on to adjust the settings for both earbuds (right and left).
If the "Adaptable Acoustics" settings in the Smart Control app and the mounted ear adapters do not match correctly, the SPORT True Wireless are fully usable, but the sound quality – especially the bass performance – is not optimal.
The right or left earbud can be used alone. If you insert one earbud into the charging case during use, a short interruption of playback may occur in the other earbud.
Danger of hearing damage due to high volume levels!
Listening at high volume levels can lead to permanent hearing defects.
If you take the earbuds out of the charging case during an incoming call, the call is automatically accepted and you can use the earbuds directly for making calls. This Auto Call function can also be deactivated.
The earbuds automatically switch to idle mode if no paired Bluetooth device can be found within 15 minutes. You can wake up the earbuds from idle mode by touching their touch control panels 1x or by briefly inserting them into the charging case.
The charging case automatically switches to a power saving mode if the lid is open for more than 5 minutes. In power saving mode, inserted earbuds are not detected or switched on/off when they are removed/inserted.
Close the lid of the charging case and open it again to end power saving mode.
The earbuds do not have to be switched off explicitly.
You can also manually switch off the earbuds (idle mode) via the Smart Control app.
The earbuds automatically switch to idle mode if no paired Bluetooth device can be found within 15 minutes. You can wake up the earbuds from idle mode by touching their touch control panels 1x or by briefly inserting them into the charging case.
The charging case automatically switches to a power saving mode if the lid is open for more than 5 minutes. In power saving mode, inserted earbuds are not detected or switched on/off when they are removed/inserted.
Close the lid of the charging case and open it again to end power saving mode.
Danger of hearing damage due to high volume levels!
Listening at high volume levels can lead to permanent hearing defects.
To increase the volume:
To reduce the volume:
When the maximum or minimum volume is reached, you hear a beep.
You can also adjust the volume using the connected Bluetooth device.
To cancel the voice assistant/voice dialing:
Right or left touch control panel | Function | |
![]() | Tap 3x![]() | Activates the voice assistant |
The music playback functions are only available when the earbuds and the device are connected via Bluetooth. Some smartphones or music players may not support all functions.
Playing/pausing music
| ||
Right or left touch control panel | Function | |
![]() | Tap 1x![]() | Plays or pauses music |
Playing the previous track
| ||
Left touch control panel | Function | |
![]() | Tap 2x![]() | Plays the previous track in the playlist |
Playing the next track
| ||
Right touch control panel | Function | |
![]() | Tap 2x![]() | Plays the next track in the playlist |
The call functions are only available when the earbuds and the smartphone are connected via Bluetooth.
Some smartphones and telephony apps (e.g. WhatsApp, MS Teams, WeChat) may not support all call control functions.
During a call, you can use the right and/or left earbud to control the call functions.
Making a call
Accepting/rejecting/ending a call
If your headphones are connected to a smartphone and you receive a call, you hear a ring tone in the headphones.
If you are playing music when you receive a call, the music pauses until you end the call.
Right or left touch control panel | Function | |
![]() | Tap 1x![]() | Accepts a call |
![]() | Tap 1x![]() | Ends a call Voice prompt "Call ended" |
![]() | Tap 2x![]() | Rejects a call Voice prompt "Call rejected" |
![]() | Tap 1x![]() | Accepts an incoming call and ends the active call |
![]() | Tap 2x![]() | Rejects an incoming call and continues the active call |
If you take the paired earbuds out of the charging case during an incoming call, the call is automatically accepted and you can use the earbuds directly for making calls.
You can activate (default setting) or deactivate the function via the Smart Control app. Note that both earbuds must be switched on to adjust the settings for both earbuds (right and left).
The right or left earbud can be used alone. If you insert one earbud into the charging case during use, a short interruption of playback may occur in the other earbud.
When using the earbuds for phone calls, you may find it more comfortable if your own voice is audible in the earbuds. With the Sidetone function activated, your own voice is played back through the earbuds during a phone call.
You can activate the function (default setting) and adjust settings or deactivate the function via the Smart Control app. Note that both earbuds must be switched on to adjust the settings for both earbuds (right and left).
The right or left earbud can be used alone. If you insert one earbud into the charging case during use, a short interruption of playback may occur in the other earbud.
The advantages of the Sidetone function are particularly noticeable when using the closed ear adapters.
When the earbuds are connected to your Bluetooth device, the battery charge status can be displayed on the screen of your smartphone or device (depending on the device and operating system used).
The Smart Control app also displays the charge status of the earbuds' rechargeable batteries.
Displaying the battery charge status using the charging case
If no USB cable is connected to the charging case:
LED | Charging case WITH earbuds inserted | Charging case WITHOUT earbuds inserted | |
![]() | lights up green | ... earbuds are fully charged and the charging case can still charge at least one complete cycle | ... charging case is fully charged |
![]() | pulses yellow | ... earbuds are being charged via the rechargeable battery of the charging case | – |
![]() | lights up yellow | ... earbuds are fully charged, the charging case cannot charge another complete cycle | ... charging case is charged less than 90% |
![]() | lights up red | ... rechargeable batteries of the earbuds and the charging case are almost empty | ... rechargeable battery of the charging case is almost empty |
![]() | flashes red | ... charging error/ battery error | ... charging error/ battery error |
To be able to use the sound effects/equalizer, you require the Smart Control app.
The Sound Check function of the Smart Control app allows you to create customized equalizer presets. Sound Check guides you step by step to the optimal results.
To be able to set the voice prompts and beep sounds, you require the Smart Control app.
You can choose between voice prompts and beep sounds, or deactivate the status messages with a few exceptions (e.g. rechargeable battery is empty). Note that both earbuds must be switched on to adjust the settings for both earbuds (right and left).
To be able to customize the control functions for music playback, you require the Smart Control app.
The app allows you to customize the control functions and other commands of the earbuds, to select preset control functions or to switch off the control functions. Some basic functions cannot be changed (e.g. call control).
Store the earbuds in the charging case to prevent damage to the earbuds when not in use or during transport. The earbuds are automatically charged in the charging case so you always have the full battery life to work with.
Make sure that the protective cover of the USB socket of the charging case is always closed to protect the socket from dust and dirt.
Liquids can damage the electronics of the product!
Liquids entering the housing of the product can cause a short-circuit and damage the electronics.
If the earbuds have gotten wet:
For reasons of hygiene, you should replace your ear adapters and ear fins from time to time. Spare ear adapters and spare ear fins can be found on the SPORT True Wireless product page at www.sennheiserhearing.com.
Sonova Consumer Hearing ensures and guarantees that the rechargeable batteries perform at their optimum upon purchase of the product. If, upon purchase or within the warranty period, you suspect that a rechargeable battery is obviously defective or if a charging error/battery error is displayed, stop using the product, disconnect it from the power supply system and contact your Sonova Consumer Hearing partner. Your Sonova Consumer Hearing partner will coordinate the repair/replacement with you.
Do not return a product with a defective battery to your dealer or Sonova Consumer Hearing partner unless requested to do so. To find a partner in your country, search at www.sennheiser-hearing.com/service-support.
At the end of its operational lifetime, this product with its built-in rechargeable battery must be disposed of separately from normal household waste.
Firmware updates can be downloaded free of charge from the Internet using the Sennheiser Smart Control app.
If a problem has occurred, proceed in the following order until the problem is solved and you can use the earbuds again:
Visit the SPORT True Wireless product page at www.sennheiser-hearing.com/sport-true-wireless
There you will find a current list of frequently asked questions (FAQ) and suggested solutions.
Your question has not been answered or the problem persists?
If a problem occurs that is not listed in the FAQ section or if the problem cannot be solved with the proposed solutions, please contact your Sonova Consumer Hearing partner for assistance.
To find a partner in your country, search at www.sennheiser-hearing.com/service-support.
Wireless calling and streaming are only possible in the Bluetooth transmission range of your smartphone. The transmission range largely depends on environmental conditions such as wall thickness, wall composition etc. With a free line of sight, the transmission range of most smartphones and Bluetooth devices is up to 10 meters.
If you, and therefore the earbuds, leave the Bluetooth transmission range of the smartphone, the sound quality deteriorates increasingly until you hear the voice prompt "No connection" and the connection breaks down completely. If you immediately re-enter the Bluetooth transmission range, the connection is automatically re-established and you hear the voice prompt "Connected". If this is not the case, tap the touch control panel of the earbud 1x.
If the function of the earbuds is disturbed, perform a reset. Individual settings such as the pairing settings are not deleted.
If the function of the earbuds is disturbed and a reset does not improve, reset the earbuds to the factory default settings. This deletes, among other things, all pairing settings.
SPORT True Wireless Model: CX200TW1, CX200TW1 C, CX200TW1 L, CX200TW1 R | |
Wearing style | True Wireless stereo earbuds |
Ear coupling | ear canal, closed-back |
Frequency response | 5 Hz to 21 kHz |
Transducer principle | dynamic |
Transducer size | 7 mm |
Sound pressure level (SPL) | 110 dB (1 kHz/0dBFS) |
THD (1 kHz, 94 dB SPL) | < 0.08% |
Microphone principle | MEMS |
Microphone frequency response | 100 Hz to 10 kHz |
Microphone pick-up pattern (speech audio) | 2-mic beamforming array |
Power supply | built-in Lithium rechargeable batteries, 3.7 V ![]() earbuds: 55-72 mAh charging case: 400-420 mAh USB charging via USB-C socket of the charging case: 5 V ![]() |
Operating time | 9 hrs with rechargeable battery of the earbud (test conditions: iPhone within 1 m distance, Bluetooth AAC codec, playback of mixed music, volume level 50%, no EQ settings); 27 hrs with rechargeable battery of the charging case |
Charging time of rechargeable batteries | approx. 1.5 hrs |
Temperature range | operation: 0 to +40°C storage: –25 to +70°C |
Relative humidity | operation: 10 to 80%, non condensing storage: 10 to 90% |
Magnetic field strength | earbuds: 64 mT charging case: 177 mT |
Weight | earbuds: approx. 6 g each charging case: approx. 37 g |
Bluetooth | |
Version | Bluetooth 5.2 compatible, class 1 |
Transmission frequency | 2,402 MHz to 2,480 MHz |
Modulation | GFSK, π/4 DQPSK, 8DPSK |
Profiles | HFP, AVRCP, A2DP |
Output power | 10 mW (max) |
Codec | aptX, AAC, SBC |
Device name | SPORT True Wireless (individually adjustable via the Smart Control app) |
Number of active connections | 1 |
In compliance with the following requirements
Hereby, Sonova Consumer Hearing GmbH declares that the radio equipment type CX200TW1 (CX200TW1 R, CX200TW1 L, CX200TW1 C) is in compliance with the Radio Equipment Directive (2014/53/ EU).
The full text of the EU declaration of conformity is available at the following Internet address: www.sennheiser-hearing.com/download.
Apple, iPhone, the Apple logo and Siri are trademarks of Apple Inc., registered in the U.S. and other countries. App Store is a service mark of Apple Inc. The trademark "iPhone" is used in Japan with a license from Aiphone K.K.
Google Play and the Google Play logo are trademarks of Google LLC.
The Bluetooth word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. and any use of such marks by Sonova Consumer Hearing GmbH is under license.
Qualcomm aptX is a product of Qualcomm Technologies International, Ltd. Qualcomm is a trademark of Qualcomm Incorporated, registered in the United States and other countries, used with permission.
aptX is a trademark of Qualcomm Technologies International, Ltd., registered in the United States and other countries, used with permission.
Other product and company names mentioned in the user documentation may be the trademarks or registered trademarks of their respective holders.
Sonova Consumer Hearing GmbH gives a warranty of 24 months on this product.
For the current warranty conditions, please visit our website at www.sennheiser-hearing.com/warranty or contact your Sonova Consumer Hearing partner.
Sonova Consumer Hearing GmbH
Am Labor 1
30900 Wedemark
Germany
www.sennheiser-hearing.com
Here you can download full pdf version of manual, it may contain additional safety instructions, warranty information, FCC rules, etc.
Download Sennheiser SPORT True Wireless, CX200TW1 - Stereo Earbuds Manual
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