Remote button withdraw a garrison and arming View storage ... With the function of video talk-back, unlocking by remote control, monitoring Door-stationIn case of emergency, calling management ... 5/4-inch color Liquid Crystal Display, Easy viewingHands-free calls, safe, easy communication.Video Room-station has unique ... color TFT: 3.5/4inchMaterial of frameABS Color hands-free door entry 3.5",4"TFT kit "L"