... factory price. Name:LRK-061-1 video door phone one outdoor unit & two indoor units Features:Aluminum alloy panel of indoor ... fashionable. Guard against disassembly,anti-hit,waterproof,wearable zinc alloy outdoor station. 7"TFT,nonradiative,energy saving and high definition picture ... The color video door phone is easy to install. Details:Outdoor unitDistance of infrared radiation shall be not less than 4 ...