HT4186-Q – How to Re-pair, Connect, and Lock the Headphones to the Transmitter?

If your HT4186-Q headphones and transmitter fail to reconnect, please follow these steps to reconnect and lock them again. This may be because you paired your headphones with another device, or you're using a new replacement pair of headphones.

1. If your transmitter is connected to your TV's USB port, switch it to another power source, such as your wall outlet or laptop. Then turn off the TV. This is to prevent interference from your TV.

2. Get the Avantree Audikast-3 transmitter into pairing mode.

• Connect the Audikast-3 to a power source and turn it on.
• Press & hold the "" button until the Bluetooth indicator flashes Red & Blue.

3. Get the NB16 headphones into pairing mode.

• Turn the headphones off.
• Press & hold the Multi-Function Button (MFB) until the LED flashes Red & Blue, and you hear "pairing".

4. Wait for them to connect. Once connected, you will see "AD" and "∞" light up on the transmitter. The headphones will turn solid Blue.

5. Lock them up again (very important) - Press & hold both the "" and "" buttons on the transmitter for about 10 seconds until the "" indicator turns Pink for a couple seconds. Now, the transmitter and the headphones are LOCKED and will always connect to each other once turned on.

Notes：If the headphones and transmitter still fail to reconnect after re-pairing and locking, please perform a Reset.