1) 2.4G digital wireless video/audio transmitting; 
2) Two way radio, hands free talking; 
3) Clear night vision, 24 hours moniting, remote unlock functions; 
4) 3.5inch color LCD display, high video quality; 
5) Photo recorder, can save 200 PCS pictures for review; 
6) Indoor unit power supply by rechargeable Li-ion battery, can also work without battery; 
7) Multi camera, single monitor/Multi monitor, single camera are available;