Video doorphone for 6 apartment Intercom video security products monitoring homesecurity 4.5"TFT LCD CE ,FCC, CCC,Rohs Video Doorphone for 6 apartment Door bell:OP-D7D6-6 Functions & features:1.Call &Two way communication for this video electronics equipment;2.Monitoring for video electronics;3.Release door function;4.Video transmission;5.IR CCD camera;6.Compatibility of video and audio indoor ...