... Wireless,video,doorbell CE,FCC,ROHS Passed remote control doorbell 2.4G remote control doorbell /digital video doorbell/doorbell manufactor/TA ... pressing the unlock button on video door phoneIntercom function between or among video door phonesReal-time communicationBrightness ,constrast and ... key wake up call ,standly power-sawing sleep5)Unclock door and alarm function6)CE, ROHS,FCC available7)83 ...