... 20dBm(100mw)4,AFH Adaptive Frequency Hopping technology, with wireless LAN and Bluetooth devices share 2.4G ... Details:Wireless intercom doorbell is a set of multi-way intercom system,can be uesd in offices,workshops, ... CALL state. B,If off-hook, beep tone stopped , enter the call state with the green light. C ... ,refund standby. F:In the process of waiting for the off-hook, press CALL key again 1,If ...