OPERATION
●
Full Duplex function
（
One-to-One
）
1. Select and press the number of the intercom you wish to talk to, and the LCD will display the number
you want to call and flash indicating you are ready to talk to that intercom.
2. Press the "Dial" button to begin a conversation with that intercom. While transmitting, your LCD display
will turn red (the LCD TX logo will also light up, and the call tone will also sound), indicating that you are
transmitting. When the called walkie-talkie receives call signaling, it will ring the caller's ringtone and the
LCD will display the caller's number to let you know who is calling you. Only needs to press "call" to enter
the call state. If you don't press the "Dial" button in 40S, it will think that no one is answering and exit to
standby mode. When in a call, press the "Hook" button to end the call.
***NOTE: Intercom radio communication use “Full duplex”, please make sure to check Under the same A/B
CODE filter before using
In order to ensure that your call is not disturbed. When you are on a call, you will occupy the local channel
and the channel of the called walkie-talkie. At this time, if someone calls the phone or the called walkie-
talkie, it will prompt a busy tone. The duplex talk lasts for 1 hour. If it exceeds 1 hour, it will automatically
exit and you need to reconnect.
●
Group Function (One-to-Many )
Press "GROUP" to talk, you will see the logo be lighted up in red ,all other devices can hear you.To be able
to respond to a group conversation, you need to press “Group” on your intercom to talk back.
●
Adjusting the volume
Fast press "VOL+" or "VOL-" to adjust the volume.
