... -inch color LCD With the function of video talk-back, unlocking by remote control, monitoring Door-stationIn case of emergency, calling management ... Liquid Crystal Display, Easy viewingHands-free calls, safe, easy communication.Video Room-station has unique shape, elegant and graceful.Receive information ... color TFT: 3.5/4inchMaterial of frameABS Color hands-free door entry 3.5",4"TFT kit "L"