6" B/W monitor Motion Detection (alarm) Intercom (Doorphone & Monitor) Automatic image storage Wireless Unlock Built - in antenna Received up to 4 channel signals Switch off automatically after 20 secs Switch on automatically when someone arrives Weatherproof design PIR function 1/4" CMOS sensor Auto electronic shutter 8 pcs IR Leds for night vision Build-in microphone Build-in Antenna Low Power Consumption