1.IR night vision 2.clear voice for intercom 3.stable quality Product name: 7" screen Wired Video Door Phone with high quality Features:1,7"inch display screen2,CMOS camera3,Light Source at Night: Infrared LED 4,Video intercom,unlocking,monitor functions5,handfree monitor6,Ring Tone: 16 chord ring tones 7,Display Screen Pixel: 480*234Specifications (Indoor)Display Screen: 16:9 Colored Analog LCD ...