Panasonic RB-HF520B, RB-HF420B Quick Start Guide

Panasonic RB-HF520B, RB-HF420B Quick Start Guide

Also See for RB-HF520B:


Panasonic RB-HF520B, RB-HF420B Quick Start Guide

Part names

Part names

  1. Raised dot indicating the left side
  2. Ear pads
  3. Charging terminal (DC IN)
  4. LED indicator light*1
  5. Microphone
  6. [] button
  7. [] button*2
  8. [] button

*1 Hereafter referred to as "LED"

*2 : Standby/ON,



The rechargeable battery (installed in the unit) is not charged initially. Charge the battery before using the unit.

Connect this unit to a computer (a) using the USB charging cord (supplied) (b).

  • The LED (c) lights in red when charging is in progress. When charging is completed, the LED will go out.
  • It takes approx. 4 hours to charge the battery from empty to full.
  • Check the direction of the terminals and plug in/out straight holding onto the plug. (It may result in malfunction by the deforming of the terminal if it is plugged in obliquely or in wrong direction.)
  • The power cannot be turned on while charging.
  • Make sure the computer is turned on and is not on standby or sleep mode.
  • Do not use any other USB charging cords except the supplied one.
  • When the battery starts running low during use of the unit, the blinking LED will turn from blue to red. A beep will sound every 1 minute. When the battery runs out, an English guidance message will be heard and the power will turn off.

Turning the power on/off

Turning the power on/off

Press and hold [] (a) of this unit for approx. 3 seconds until the LED (blue) (b) blinks.

  • A beep will sound, and the LED (blue) will blink slowly.

To turn the power off
Press and hold [] for approximately 3 seconds. A guidance message will be heard, and the power will be turned off.

  • If the unit is not connected to a Bluetooth®device, an English guidance message will be heard and turn off the unit automatically approximately 5 minutes after you have stopped using it. (Auto power off)

Connecting a Bluetooth® device

Connecting a Bluetooth® device

  • Bluetooth® pairing
  1. In the power-off state, press and hold [] of this unit until the LED blinks.
  • When pairing a device for the first time:
    approx. 3 seconds
  • When pairing a second or subsequent devices:
    approx. 5 seconds
  • The unit starts to search for the Bluetooth® device for connection, and the LED will blink in blue and red alternately.
  1. Turn on the power of the Bluetooth®device, and enable the Bluetooth®function.
  2. Select "RB-HF520B" or "RB-HF420B" (a) from the Bluetooth®device's menu.
  • If prompted for a passkey, input the passkey "0000 (four zeros)" of this unit.
  • When the LED (blue) blinks twice every approx. 2 seconds, pairing (registration) is completed. (Connection established)
  • If connection to a device is not established within approximately 5 minutes, the unit will be turned off. Perform pairing again.
  • Connecting a paired Bluetooth® device
  1. Turn on this unit.
  2. Perform steps 2 and 3 of "Bluetooth®pairing". [above)
  • When the LED (blue) blinks twice every approx. 2 seconds, pairing (registration) is completed. (Connection established)

Using the headphones

Using the headphones

When using the functions below that are indicated with the [] mark, connect the Bluetooth® device and the unit.

  • Listening to music []
    Select and play the music on the Bluetooth®device.
  • The unit's headphones will output the music or the audio of the video being played back.
  • Remote controlling (Available only if your Bluetooth® device supports "AVRCP" Bluetooth® profiles) []
    (Operation example)
    Play / Pause:Press [] (a).
    Increase the volume: Press [] (b).
    Decrease the volume: Press [] (c).
    Forward to the start of next track: Press and hold [] for approximately 2 seconds.
    Return to the start of current track: Press and hold [] for approximately 2 seconds.
  • The volume can be adjusted in 16 levels. When the maximum or minimum volume is reached, a beep will sound.
  • Making a phone call []
  1. Press [] (a) on the unit and answer the incoming call.
  • (HFP only) To reject the incoming call, press [ ] twice quickly.
  1. Start talking.
  2. Press [] to end the phone call.
  • (HFP only) It may be difficult to hear phone conversations when the unit is used in locations with loud ambient noise or in outdoor or other locations exposed to powerful winds. In that case, change the calling location or switch the calling device to the Bluetooth® enabled phone to continue the call. (Press [] on the unit twice quickly to switch.)
  • You can have the Bluetooth® enabled phone make phone calls by using the microphone of the unit and an app of the Bluetooth® enabled phone.
    (below, "Activating voice functions")
  • Activating voice functions []
    You can activate Siri or other voice functions with a button on the unit. Press [ ] (a) of this unit twice quickly.
  • Restoring to the factory settings
    Charge the battery before restoring the unit.
  1. While the unit is turned off, press and hold [] for at least 5 seconds until the LED starts blinking alternately in blue and red.
  2. While the LED is blinking alternately in blue and red, press and hold [] (b) and [] (c) at the same time for at least 5 seconds.
  • The default settings will be restored after the LED (blue) blinks fast and the unit turns off.
  • When pairing a device again, delete the registering information (Device: "RB-HF520B" or "RB-HF420B") from the Bluetooth®device's menu, and register this unit with the Bluetooth® device again. (D)

To remove the battery when disposing of this unit

To remove the battery when disposing of this unit

The following instructions are not intended for repairing purposes but for the disposal of this unit. This unit is not restorable once disassembled.

  • When disposing of this unit, take out the battery installed in this unit and recycle it.
  • Disassemble after the battery runs out.
  • Keep disassembled parts out of reach of children.

Regarding the handling of used batteries

  • Insulate the terminals with adhesive tape or similar material.
  • Do not disassemble.
  • Batteries
  • Do not heat or expose to flame.
  • Do not leave the battery(ies) in a car exposed to direct sunlight for a long period of time with doors and windows closed.
  • Battery mishandling can cause electrolyte leakage which can damage items the leaked fluid comes into contact with. If electrolyte leaks from the battery, consult your dealer. Wash thoroughly with water if electrolyte comes in contact with any part of your body.
  • When disposing of the batteries, please contact your local authorities or dealer and ask for the correct method of disposal.
  1. Remove the right ear pad.
  2. Remove the 4 screws and then the plate.
  3. Cut the 3 cords (red, blue, black) one by one, and remove the 2 screws and then the board.
  4. Remove the 4 screws.
  5. Insert a rod-like object that does not have a pointy end (a) into the hole and push the battery out.
  • Take care not to damage the battery.
  1. Cut the cords coming out of the battery one by one, and then take out the battery.


Clean this unit with a dry and soft cloth.

  • Do not use solvents including benzine, thinner, alcohol, kitchen detergent, a chemical wiper, etc. This might cause the exterior case to be deformed or the coating to come off.

Safety precautions

  • Unit

To reduce the risk of fire, electric shock or product damage,
  • Do not expose this unit to rain, moisture, dripping or splashing.
  • Do not place objects filled with liquids, such as vases, on this unit.
  • Use the recommended accessories.
  • Do not remove covers.
  • Do not repair this unit by yourself. Refer servicing to qualified service personnel.

Avoid the use in the following conditions

  • High or low extreme temperatures during use, storage or transportation.
  • Disposal of a battery into fire or a hot oven, or mechanically crushing or cutting of a battery, that can result in an explosion.
  • Extremely high temperature and/or extremely low air pressure that can result in an explosion or the leakage of flammable liquid or gas.
  • Avoid using or placing this unit near sources of heat.
  • Do not listen with this unit at high volume in places where you need to hear sounds from the surrounding environment for safety, such as at railroad crossings, and construction sites.
  • Allergies
  • Discontinue use if you experience discomfort with the ear pads or any other parts that directly contact your skin.
  • Continued use may cause rashes or other allergic reactions.
  • Precautions for listening with the Headphones
  • Excessive sound pressure from earphones and headphones can cause hearing loss.
  • Do not use your headphones at a high volume. Hearing experts advise against continuous extended play.
  • If you experience a ringing in your ears, reduce volume or discontinue use.
  • Do not use while operating a motorised vehicle. It may create a traffic hazard and is illegal in many areas.
  • You should use extreme caution or temporarily discontinue use in potentially hazardous situations.
This unit may receive radio interference caused by mobile telephones during use. If such interference occurs, please increase separation between this unit and the mobile telephone.
Use only the supplied USB charging cord when connecting to a computer.
This unit is intended for use in moderate and tropical climates.


  • General
Power supply DC 5 V, 400 mA
(Internal battery: 3.7 V (Li-polymer))
Operating time*1 Approx. 50 hours
Charging time*2 (25 oC) Approx. 4 hours
Charging temperature range 10 oC to 35 oC
Operating temperature range 0 oC to 40 oC
Operating humidity range

35 %RH to 80 %RH

(no condensation)

Mass [RB-HF520B] Approx. 205 g
[RB-HF420B] Approx. 155 g
  • Bluetooth® section
Frequency band 2402 MHz to 2480 MHz
Supported profiles A2DP, AVRCP, HFP
Supported codec SBC

*1It may be shorter depending on the operating conditions.

*2The time required to charge the battery from empty to full.

  • Specifications are subject to change without notice.


Before requesting service, make the following checks. If you are in doubt about some of the check points, or if the remedies indicated do not solve the problem, consult your dealer for instructions.

No sound.

  • Make sure that the unit and the Bluetooth® device are connected correctly. (D)
  • Check if music is playing on the Bluetooth®device.
  • Make sure that the unit is turned on and the volume is not set too low.
  • Pair and connect the Bluetooth® device and the unit again. (D)
  • Check if the Bluetooth® compatible device supports "A2DP" profile. For details on profiles, see "Listening to music" in "Operating Instructions (PDF format)". Also refer to the operating manual for the Bluetooth®compatible device.

Low volume.

  • Increase the volume of the unit. (E)
  • Increase the volume on the Bluetooth® device.

Sound from the device is cut off. / Too much noise. / Sound quality is bad.

  • Sound may be disrupted if signals are blocked. Do not fully cover this unit with the palm of your hand, etc.
  • The device may be out of the 10 m communication range. Move the device closer to this unit.
  • Remove any obstacle between this unit and the device.
  • Switch off any wireless LAN device when not in use.
  • A communication problem may arise if the battery is not fully charged. Charge the unit. (B)

The device cannot be connected.

  • Delete the pairing information for this unit from the Bluetooth®device, then pair them again. (D)

You cannot hear the other person.

  • Make sure that the unit and the Bluetooth®enabled phone are turned on.
  • Check if the unit and the Bluetooth®enabled phone are connected. (D)
  • Check the audio settings of the Bluetooth®enabled phone. Switch the calling device to the unit if it is set to the Bluetooth® enabled phone. (D)
  • If the volume of the other person's voice is too low, increase the volume of both the unit and the Bluetooth® enabled phone.

Cannot make a phone call.

  • Check if the Bluetooth® compatible device supports "HFP" profile. For details on profiles, see "Listening to music" and "Making a phone call" in "Operating Instructions (PDF format)". Also refer to the operating manual for the Bluetooth® enabled phone.

The unit does not respond.

  • This unit can be reset when all operations are rejected. To reset the unit, connect the unit to a computer using the USB charging cord. (The pairing device information will not be deleted.)

Cannot charge the unit.

  • Is the USB port you are currently using working properly? If your computer has other USB ports, unplug the connector from its current port and plug it into one of the other ports.
  • If the measures mentioned above are not applicable, unplug the USB charging cord and plug it in again.
  • If the charge time and operating time become shortened, the battery may have run down. (Number of charging times of the installed battery: Approximately 300)

LED does not light during charging. / Charging takes longer.

  • Is the USB charging cord connected firmly to the USB terminal of the computer? (B)
  • Make sure to charge in a room temperature between 10 oC and 35 oC.

The power does not turn on.

  • Is the unit being charged? The power cannot be turned ON during charging. (B)

Declaration of Conformity (DoC)

Hereby, "Panasonic Corporation" declares that this product is in compliance with the essential requirements and other relevant provisions of Directive 2014/53/EU.

Customers can download a copy of the original DoC to our RE products from our DoC server:

Contact to Authorised Representative:
Panasonic Marketing Europe GmbH,
Panasonic Testing Centre, Winsbergring 15,
22525 Hamburg, Germany

Type of wireless Frequency band Maximum power
Bluetooth® 2402 - 2480 MHz 4 dBm

For the United Kingdom and Ireland customers
Sales and Support Information

Customer Communications Centre

  • For customers within the UK: 0344 844 3899
  • For customers within Ireland: 01 289 8333
  • Monday–Friday 9:00 am–5:00 pm (Excluding public holidays).
  • For further support on your product, please visit our website:

Direct Sales at Panasonic UK

  • Order accessory and consumable items for your product with ease and confidence by phoning our Customer Communications Centre Monday–Friday 9:00 am–5:00 pm (Excluding public holidays).
  • Or go on line through our Internet Accessory ordering application at
  • Most major credit and debit cards accepted.
  • All enquiries transactions and distribution facilities are provided directly by Panasonic UK.
  • It couldn't be simpler!
  • Also available through our Internet is direct shopping for a wide range of finished products. Take a browse on our website for further details.

For Australia
Panasonic Australia Pty. Ltd.
1 Innovation Road, Macquarie Park NSW 2113

Provides a 12 month parts & labour warranty on this product for manufacturing defects from date of purchase. In additi on to your rights under this warranty, Panasonic products come with consumer guarantees that cannot be excluded under the Australian Consumer Law. If there is a major failure with the product, you can reject the product and elect to have a refund or to have the product replaced or if you wish you may elect to keep the goods and be compensated for the drop in value of the goods. You are also ent itled to have the product repaired or replaced if the product fails to be of acceptable quality and the failure does not amount to a major failure.

For full details or to claim warranty please contact Panasonic Customer Care on 132 600 or visit

For Thailand only
This telecommunication equipment conforms to NTC/NBTC technical requirement.

For Singapore only
Complies with IMDA Standards DB01017

The Bluetooth® word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. and any use of such marks by Panasonic Corporation is under license.

Other trademarks and trade names are those of their respective owners.

Siri is a trademark of Apple Inc., registered in the U.S. and other countries.

QR Code is a registered trademark of DENSO WAVE INCORPORATED.

Other system names and product names appearing in this document are in general the registered trademarks or trademarks of the respective developer companies.

Note that the TM mark and ® mark do not appear in this document.

Documents / Resources


Download manual

Here you can download full pdf version of manual, it may contain additional safety instructions, warranty information, FCC rules, etc.

Download Panasonic RB-HF520B, RB-HF420B Quick Start Guide


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