Access control 4"TFT black/white video door phone Talk,Unlock ... ,Monitor,Easy set up,melodies for chiose,competitive factory price Name:LRK-682B Access control 4"TFT ... black and white video door phone Features:Aluminum alloy ... hit,waterproof, wearable zinc alloy outdoor station. 4"TFT, nonradiative,energy saving and high definition picture ...