China Wholesale Video Door Phones

A videophone, also known by the trademarked name Picturephone, is a telephone with a video screen, which is capable of both audio and video duplex transmission. Videophones are also known as video telephones, which was the world's first commercial videophone produced in volume.
View and talk to visitors inside your home, they also can answering you, then let them inside with the press of a button! This high-quality security video door phone system provides an elegant, self-contained package for entrance monitoring. When a visitor presses the button on the door unit, the monitor screen turns on and a chime tone plays. To converse with your visitor, simply pick up the handset and talk. You can even let your guest inside by pressing the "open" button to unlock the door. Electric door strike required for this feature (sold separately). Some color expandable and hands free video intercom systems make monitor more clorful and clear, and voice lounder.