How to lock the paired headphone with Audikast?

Audikast has locking function. You can lock one paired headphone with it. Once locked, the transmitter will automatically reconnect to locked headphone when powered on.

Here is how to lock it with the headphone.

Step 1: Pair the headphone with the Audikast

Step 2: Batch NO. before 25B1, press and hold the button for 10 seconds.

Batch NO. from 25B1,  press and hold the & buttons together for 10 seconds.