Brand: Panasonic
Category: Portable Electronics
Document Type: Manual
Language: EN
Available Languages: EN , ES
Manual for RZ-B120W
Uploaded: Nov. 21, 2025, 6:24 p.m.
Warranty Information
No specific warranty period is mentioned in the manual.
1. **Charging:** Before initial use, remove the insulation sheet and charge the earphones and charging cradle using the supplied USB charging cord.
2. **Fitting:** Ensure the L and R earphones are correctly oriented and fit them firmly into your ears. Replace earpieces if necessary.
3. **Power On/Off:** Remove from charging cradle to turn on, place back to turn off. Manual power on/off is also possible by touching and holding the touch sensors.
4. **Bluetooth Pairing:** Take earphones out, turn on Bluetooth on your device, and select "RZ-B120W" from the list.
5. **Listening to Music:** Connect to your device, select and play music. Use touch sensors for playback control and volume adjustment.
6. **Making Calls:** Connect to your phone, touch to answer/reject calls, and touch and hold to end calls.
7. **Voice Assistant:** Touch and hold the L touch sensor to activate Siri or Google Assistant.
Troubleshooting and error codes
| Problem | Solution |
|---|---|
| Does not connect with the Bluetooth® device. | Delete registration information from the Bluetooth® device and pair again. Disconnect the connected device if connecting to a different device. |
| The left and right batteries deplete at different rates. | This may be due to signal and usage conditions. |
| Cannot charge the unit. | Charge between 10 °C and 35 °C. Ensure USB charging cord is connected properly. Check if the charging cradle has battery. Re-insert earphones into the cradle. |
| Cannot operate the earphones. | Try turning the power off and on. Restore factory settings. |
| The earphones do not turn on automatically. | Touch and hold the touch sensor for about 3 seconds to turn on manually. |
| No sound. | Ensure earphones and Bluetooth® device are connected. Check if music is playing. Pair and connect again. Check for A2DP profile support. |
| Low volume. | Increase volume on the Bluetooth® device. |
| Sound from the device is cut off. / Too much noise. / Sound quality is bad. | Ensure good signal strength, not in communication range. Remove obstacles. Switch off other wireless LAN devices. |
| The voice of the person on the other end of the call is small. | Increase volume on the Bluetooth® device. |
| Cannot make a phone call. | Check for HFP profile support on the Bluetooth® device. Check and adjust audio settings on the telephone. |