1: 7inch color TFT video door phone 2: unlock by ID card,by password,by key 3: handfree,night vision 4: ultrathin monitor New 7 inch TFT color video door phone intercom systems , Model:SMTV7E-DFunction and Features**plastic camera, unlock by ID card,by password,by key, good design,CMOS or CCD sensor.6 LED lights,nightvision.**handfree indoor monitor,7 inch TFT,clear image.**intercommunication, ...