... video interphone,200M remote distance,Monitor/Talk/Doorbell function Specifications:2.5" TFT LCD Screen;Remote Range:200M(in open area ... Infrared Night Version camera,work well even in dark environment;2.4 G Frequency-Hopping Spread Spectrum technology afford stable digital ... -stop service,with experienced and qualified personnel working with you step of the way,from Design,R & D,Mold Making,Toloing ...