"video door phone",video intercom system,color video door phone,200M remote range,waterproof,CMOS Night Version ... ",video intercom system,color video door phone,200M remote range,waterproof,CMOS Night Version camera,OEM Specifications:2.5" TFT LCD Screen;Remote ... Night Version camera,work well even in dark environment;2.4 G Frequency-Hopping Spread Spectrum technology afford stable digital signal ...