Door Phone 3in1 3.5" LCD 2.4G wireless video door phone intercom System Light Source - Six (6) Infrared LED lights Camera Sensor - CMOS Power Source - AC Adapter (100-240V) 50/60Hz Transmitting Frequency - 2.4GHz Onboard Buttons/Indicators - Call Button, 6 LED Lights. MIC, Speaker, LED Indicator, Power ON/OFF Switch