... phone with 3.5 inch screen Color Hands-Free Digital Wireless Video Door Phone System Primary Function: Home or ... Onboard Buttons/Indicators - Unlock Door, View Monitor. Talk Button, MIC, LED Indicator, Mini USB Input, Speaker, Volume -/+, Brightness control -/+, Antenna, ... - Camera Sensor - CMOS - Light Source - Six (6) Infrared LED lights - Power Source - AC Adapter (100-240V) 50/60Hz - Transmitting ...