Safety precautions Although this product was designed to be used safely, failing to use it correctly may result in an accident. To ensure safety, observe all warnings and cautions while using the product. Cautions for the headphones Do not use the product near medical equipment. Radio waves may affect cardiac pacemakers and medical electronic equipment.
Safety precautions Do not charge the battery if the terminal of the USB charging cable is bent, loose, or damaged. Doing so may cause heat generation, smoke emission, fire or electric shock. Do not charge the product if water or foreign matter is inside the battery jack or USB charging cable. Doing so may cause corrosion, heat generation, smoke, fire, or other malfunction or electric shock in the battery jack or USB charging cable.
Notes on use Be sure to read the connected device’s user manual before use. Audio-Technica will not be liable in any way for any loss of data in the unlikely event that such losses should occur while using the product. On public transportation or in other public places, keep the volume low so as not to disturb other people.
Waterproof performance The waterproof performance of the product is designed to prevent the ingress of liquids from sweating during operation and simple washing (equivalent to IPX5/7). JIS/IEC protection grade IPX5 means that the headphones are protected against exposure to water jets. JIS/IEC protection grade IPX7 means that the headphones are protected from being affected by immersion in water.
For a more comfortable Bluetooth communication experience The effective communication range of this product varies depending on obstructions and radio wave conditions. For a more enjoyable experience, please use the product as close as possible to the Bluetooth device. To minimize noise and sound disruptions, avoid placing your body or other obstacles between the product’s antenna and the Bluetooth device.
Part names and functions Headphones Multifunction button Use to play/pause music and answer phone calls. Also use to adjust the volume (+/–). The L (left) side has a protrusion for distinguishing between the left and right. L/R (left/right) indicator Indicator lamp Displays the operating status and battery level of the headphones.
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Part names and functions Battery jack Use to connect the included USB charging cable and charge the product. Accessories ™ USB charging cable (30 cm (12"), USB Type-A / USB Type-C Eartips (XS, S, M, L) At the time of purchase, the M-size eartips are attached to the product. Removing the insulation seal Remove the insulation seal before use.
Charging the battery Fully charge the battery when using for the first time. When the rechargeable battery is running low, the voice guidance will play the message “Low battery”, and the indicator lamp will flash in red. Charge the battery as soon as possible. It takes about 3 hours to fully charge the headphones, and about 3 hours to fully charge the charging case.
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Charging the battery Connect the included USB charging cable (USB Type-A side) to the computer to start charging. While charging, the charging indicator lamp lights/flashes as follows. (It may take several seconds for the charging indicator lamp to light.) Charging indicator lamp Status Flashing white Charging...
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Charging the battery Indicator lamp Indicator lamp Status Lights in white Charging Charging complete / Charging case battery has no power...
Power supply ON/OFF Turning on the product Remove the headphones from the charging case. The power will turn on automatically, and the indicator lamps will light in white and then flash. Voice guidance is played. Press and hold (for about 2 seconds) the multifunction buttons to turn the power on manually. It may take several seconds for the indicator lamps to light.
Use your Bluetooth device to begin the pairing process and search for the product. When your Bluetooth device finds the product, “ATH-CK1TW” will be displayed on the device. For information about using your Bluetooth device, refer to the device’s user manual.
Connecting via Bluetooth Pairing with Fast Pair In one touch, the product enables quick, effortless Bluetooth pairing with your Android devices. You can even check to see where you last placed it. Turn on the Bluetooth function on an Android device configured with a Google account. Remove the headphones (L (left) and R (right)) from the charging case and bring them close to the Android device.
Using the product The product can use Bluetooth wireless technology to connect to your device and play music, receive phone calls, etc. Use the product for whichever of these purposes suits your needs. Note that Audio-Technica cannot guarantee the operation of displays, such as the battery level display, or applications via Bluetooth devices. Listening to music To connect for the first time, pair the product and your device via Bluetooth wireless technology.
Using the product Operation Function Press Starts or pauses playback. Press (twice) Plays the next track. Press (three times) Plays the previous track / returns to the start of the track. The controls explained above may not be available on some smartphones. L (left) side headphone multifunction-button operation Multifunction button Operation...
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Using the product To end the call, press and hold (about 2 seconds) the multifunction button on the L (left) or R (right) side headphone and release your finger when you hear a confirmation sound. Calls can be ended from either the L (left) or R (right) side headphone. If the call was received while listening to music, playback is resumed.
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Using the product L (left) side headphone multifunction-button operation Multifunction button Operation Function Receiving a call: Answers the call. Press During a call: Increases the call volume by 1 level. Press (twice) During a call: Decreases the call volume by 1 level. Press and hold (about 2 seconds) and Receiving a call: Rejects the call.
Using the product Press and hold (about 2 seconds) the multifunction button on the R (right) side headphone and release your finger when you hear the confirmation sound. The speech recognition feature (such as Google Assistant or Siri) is activated. The speech recognition feature cannot be activated during a call.
Voice guidance The product plays English voice guidance in the following situations. Situation Voice guidance Voice guidance varies depending on the battery level: Battery level high Power is turned on Battery level medium Battery level low Bluetooth is connected Bluetooth connected Bluetooth is disconnected Bluetooth disconnected Low latency mode ON...
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Cleaning Get into the habit of regularly cleaning the product to ensure that it will last for a long time. Do not use alcohol, paint thinners, or other solvents for cleaning purposes. Headphones Remove the eartips when cleaning the headphones. The headphones may not function properly if they become wet.
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Cleaning Although the headphones have a waterproof rating equivalent to IPX5/7, the sound reproduction parts and the microphones are not water resistant. If any water enters the interior of the headphones, no sound will be reproduced, or sounds may be difficult to hear. In such cases, place a dry cloth on a flat surface as shown in the figure below, and with the sound reproduction part and the microphone respectively facing the bottom, shake the headphone approximately 20 times.
Eartips Eartip size The product includes silicone eartips in 4 sizes (XS, S, M, and L). At the time of purchase, the M-size silicone eartips are attached. To ensure the best sound quality, select the eartip size that is best suited for you, and adjust the eartips inside your ears for a snug fit.
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Forced pairing mode / reset If the product does not connect to a device (forced pairing mode) If pairing cannot be cancelled or is not successful, you can use forced pairing mode to perform pairing again. When operating, hold the headphones so that they stay in the charging case. About 5 seconds after both headphones (L (left) and R (right) sides) are placed in the charging case (with battery remaining), press and hold (about 6 seconds) the multifunction buttons of both headphones.
Troubleshooting Power is not supplied Charge the product. Unable to pair Confirm that the Bluetooth device communicates using Ver. 2.1+EDR or higher. Place the product and the Bluetooth device within 1 m (3.3') of each other. Set the profiles for the Bluetooth device. For procedures on how to set profiles, refer to the Bluetooth device’s user manual.
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Troubleshooting Sound is distorted / Noise is heard / Sound cuts out Turn down the volume on the product and the Bluetooth device. Keep the product away from devices that emit radio waves such as microwaves and wireless routers. Keep the product away from TVs, radios, and devices with built-in tuners. These devices can also be affected by the product.
Specifications Headphones Type Dynamic Driver 4.9 mm Sensitivity 98 dB/mW Frequency response 20 to 25,000 Hz 16 ohms Impedance Microphone Type MEMS type Polar pattern Omnidirectional -38 dB (1 V/Pa, at 1 kHz) Sensitivity Frequency response 100 to 10,000 Hz Communication specifications Communication system Bluetooth version 5.1...
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Specifications Other Headphones: DC 3.7 V lithium ion battery Power supply Charging case: DC 3.7 V lithium ion battery [1][2] Headphones: Approx. 3 hours Charging time [1][2] Charging case: Approx. 3 hours Continuous transmission time (music playback): Max. approx. 7 hours Operating time (headphones) Max.
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Trademarks ® The Bluetooth word mark and logos are registered trademarks owned by Bluetooth SIG, Inc., and any use of such marks by Audio-Technica Corporation is under license. Other trademarks and trade names are those of their respective owners. ™ USB Type-C is a trademark of USB Implementers Forum.
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