The Bluetooth system can be paired with another Bluetooth system for
Bluetooth intercom conversation.
1. Press and hold the (-) Button of the Bluetooth system A and B for
Pairing with Intercom B
2. Simply tap the (-) Button of any one of the Bluetooth system A and B,
and wait until intercom connection is automatically established.
When the Bluetooth system completes the pairing process, you will
hear a double beep.