If the REDMI Watch 5 cannot pair with headphones to play music, please refer to the following information:
1. The headphones can not be in Bluetooth pairing mode. Please make sure the headphones are powered on and set to pairing mode, then retry the connection.
2. The headphones can not have been searched correctly. On the REDMI Watch 5, go to [Settings] >> [Earphones] and allow the watch to automatically search for nearby Bluetooth headphones.
3. There can be compatibility limitations between the watch and certain headphone models. If the headphones cannot be detected, this indicates a compatibility issue.
4. You can try connecting a different pair of Bluetooth headphones. If another pair connects successfully, the watch is functioning normally, and the issue is related to the original headphones.
5. Bluetooth connection errors can occur temporarily. Turning off Bluetooth on both the watch and the headphones, then restarting and reconnecting them.
6. Outdated system software can affect Bluetooth performance. Please ensure the REDMI Watch 5 is updated to the latest firmware version to improve stability and compatibility.
7. If the issue still persists after following the steps above, it is recommended to send feedback for further assistance and professional inspection.