Sennheiser HDR-120 user manual

To connect your Sennheiser HDR 120 wireless headphones, follow these steps:
1. Place the headphones on the charging base station and ensure the power is plugged in.
. Allow the headphones to charge for at least 24 hours for the initial setup.
3. Once charged, remove the headphones from the charging base and turn them on.
4. On the front of the transmitter base station, locate the audio input ports. These can be labeled as "audio in," "aux in," or "analog audio."
5. Connect an audio output source (such as a TV or stereo system) to the transmitter base station using the appropriate audio cable. The type of cable you need will depend on the available ports on your audio source and the transmitter base station.
- If your audio source has a headphone jack, use a 3.5mm audio cable to connect from the headphone jack to the audio input port on the transmitter base station.
- If your audio source has RCA ports (red and white), use an RCA-to-3.5mm adapter cable to connect from the RCA ports to the audio input port on the transmitter base station.
6. Ensure the audio source is powered on and set to an appropriate volume level.
7. Adjust the headphones' volume to a comfortable level using the volume control on the right ear cup.
8. You should now be able to hear audio wirelessly through the Sennheiser HDR 120 headphones from your connected audio source.
Note: Make sure to read the user manual provided with the HDR 120 for any specific instructions related to your use case.

No, the Sennheiser HDR 120 wireless headphones do not have Bluetooth functionality. They use RF (radio frequency) technology for wireless audio transmission.

There could be several reasons why your Sennheiser TR 120 is not working. Here are a few troubleshooting steps you can try:
1. Make sure the batteries in the headphones and transmitter are properly inserted and fully charged. If they are rechargeable batteries, ensure they are properly connected to the charging cable.
2. Verify that the transmitter is properly connected to the audio source, such as a TV or stereo system. Ensure the audio cables are securely plugged into the appropriate audio outputs.
3. Check the volume levels on both the audio source and the headphones. Make sure they are turned up and not muted.
4. Confirm that the headphones are within range of the transmitter. The wireless range can vary, but typically it should work within 100 feet in an unobstructed environment.
5. Try resetting the system by turning off both the headphones and the transmitter, then turning them back on after a few seconds.
6. If none of the above steps work, it's possible that there may be an issue with the headphones or transmitter. In this case, you may need to contact Sennheiser's customer support or take it to an authorized service center for further assistance.