... The Wireless video door bell includes a professional grade front door security color camera, two-way intercom, door bell, and door release in one ... video over the air. With two-way communication, a color screen, and night vision, you'll always know who's at ... ).Visiting key wake up call, standby power-saving sleep5).Unlock door and alarm function .6).CE, ROHS , FCC available .7).83 ...