• Hang up Button:
During a duplex call, press this button to hang up and exit the duplex communication state.
Return to the standby state.
• GROUP Button:A broadcasting function (one-to-many) to communicate with all other intercoms,
(default group = 1)just hold GROUP button and talk .Great for announcements or emergency calls
• Dial Button:
When you select the channel you want to communicate with (except the local channel),
press this button,
it will send a call signal to the channel you selected, and ring the ringtone. If the line is busy,
If the line is busy, it will ring the busy tone and exit to standby mode
• MENU Button:
Long press 3S to enter the menu settings, you can choose the local channel, A/B work group,
