... duplex -CE/ROHS/FCC,pass 2.4G utility wireless door chime for villa,apartment Wireless door chime office intercom and house intercom Function Features 1. ... super anti-jamming capability, can share 2.4G band with wireless LAN and bluetooth devices5. Panel a call key,two indicator ... ) andone keyboard of 10 numbers for dial the number6. With configure Code function7. Power supply: AC 110/220V, Electric ...