HT41866-Q - How to Factory Reset/Clear Pairing History?

The transmitter and the headphones in HT41866 set are pre-paired and LOCKED with each other. The factory reset function will clear the pairing history with other devices, but the original set still remains paired and locked. If you used them separately with another device, and later found that HT41866 will not auto-reconnect with each other, you may need to do the reset.

The HT41866 set consists of 3 parts: The Audikast-3 Transmitter, and Two NB16-Q Headphones. Each needs to be reset separately.

Factory Reset the Audikast-3 Transmitter

Power ON. Press & hold the “” and “” buttons simultaneously for 10 seconds. You'll see both Bluetooth LED indicators light up Pink and turn off, indicating that the reset was successful. 

Once this is done, the Audikast-3 will re-enter pairing mode, as indicated by the Bluetooth icon next to "" flashing Red & Blue.

Turn the transmitter off.

Factory Reset the NB16-Q Headphones

After turning on, press and hold both "+" and "-"  for 10 seconds until the Red & Blue LEDs are BOTH on for 2 seconds (looks Pink) - now all the paired history of the headphones is cleared. It then enters pairing mode automatically with the LED flashing alternately Red & Blue. 

Turn the headphones off.

Then turn both the transmitter and the headphones on. Wait for 5-10 seconds, the transmitter and headphones will auto-reconnect.  You will see SOLID Blue light both on the transmitter and the headphones and hear "Connected" from headphones.      

In case they fail to reconnect, you might need manually Re-pair, Connect, and Lock the Headphones and Transmitter

Related knowledge:

1. Bluetooth device normally auto-reconnects to its LAST paired / connected device. You might need to make sure the previous used device are Bluetooth-off to avoid interference.

2. It is important to Reset both Bluetooth sender and receiver. In case of cellphone / PC, you can turn off its Bluetooth function and turn it back on.

3. If still not working, you can email us (support@avantree.com) .