... video doorbell,color video door phone,video intercom system,3.5" indoor unit,2.4GHz hopping frequency,120-200M remote range,OEM video doorbell,color video door phone,video intercom system, ... Time/Signal/Removable Recharge Battery,display on Indoor Phone.ABS Environmental Material,conform to European,American, ... are both highly welcomed. Wireless Digital Video Doorbell Villa Color Video Intercom System