Full Duplex Digital Wireless Audio Intercom / Office Doorbell Intercom

1. Power supply: AC 110/220V 2. Electric Current: within 200mA 4. Communication distance: more than 500 meters in open land 4.simple design Full Duplex Digital Wireless Audio Intercom / Office Doorbell Intercom Function Features: 1.Using 2.4G ISM public frequency band: 2403-2485MHz 2. doorbell transfer data rate: 250K 3. Transmitting Power: Less then 20dBm(Less then 100mw), Receive Sensitivity: -100 or less 4. AFH technology, super anti-jamming capability, can share 2.4G band