17-inch digital color LCD screen, no radiation, low power consumption, high definition 16:9 widescreen display. 2Ultra-thin design, aluminum panel, electroplated buttons, beautiful and luxurious. 3Hands-free intercom, one-button unlock function and active surveillance of outdoor functions. 416 polyphonic ringtones are available, image brightness, chrominance and volume can be adjusted at will. 5Electronically controlled unlocking and talking on the phone.