... vision 4: ultrathin monitor Hot 7 inch TFT color video door phone intercom systems Model:SMTV7E-SFunction and ... monitor, 7 inch TFT,clear image.** intercommunication,monitoring the outdoor,unlock..** Intercommunication is available between indoor and ... four wires,DIY installation**Including in one kit:One indoor monitor, one outdoor camera, power adapter, user manual,cables.**Packing detail: Color ...