C81 - Fix Bluetooth Pairing Issues – Avantree Support

If your headphones won’t connect to the C81, they may be reconnecting to a nearby phone, tablet, or computer instead.

Turn off Bluetooth on nearby devices, then put both your headphones and the C81 into pairing mode and try again.

Quick Check

1. Turn OFF Bluetooth on nearby laptops/computer, phones and tablet (so your headphones don’t connect to them).

2. Put your headphones in pairing mode

● Avantree headphone : Flash red and blue

● Other brands : Follow - How to Put Bluetooth Headphones in Pairing Mode

3. Plug in the C81 adapter, then press and hold its button until the light flashes blue & white.

4. Keep the headphones close to the C81 and wait a few seconds.

5. When connected, the C81 light should become steady blue or blink blue slowly.

6. Play some audio to test the connection.

Most Common Issue

1. Headphones connect somewhere else

Bluetooth headphones often automatically reconnect to the device they used last.
For example, if your headphones were previously connected to your phone, they may reconnect to the phone before the C81 can pair with them.
Fix: Turn off Bluetooth on nearby devices, then repeat the Quick Check above.

2. Headphones aren't in pairing mode

Simply turning your headphones on may not put them into pairing mode.
Fix: Put the headphones into their Bluetooth pairing mode before putting the C81 into pairing mode. The exact steps depend on your headphone model, so check the headphone manufacturer's instructions if needed.

Tip

If pairing keeps failing, temporarily move other previously paired Bluetooth devices away or turn their Bluetooth off. This helps prevent your headphones from automatically connecting to the wrong device.

Still not working?

Reset the C81 : With the C81 plugged in, hold the button for 2 seconds until the light flashes blue and white. Then double-click the button to clear its pairing history - C81 - How to Factory Reset/ Clear Pairing History

Reset or clear the Bluetooth pairing history on your headphones ( not sure? check online using your headphone model number )

Then try pairing again.

If it still won’t connect :