... IR vision 300-500meters working disance CE,FCC,ROHS passed wireless video door phone TA-888 IS made by our own R&D team ... Visiting key wake up call ,standly power-sawing sleep5)Unclock door and alarm function6)CE, ROHS,FCC available7)83 effective ... bulit-in antenna design ,fashionable outlook9)super-infrared night vision video monitor capability10)other optional function:auomatic inage shorge ,photo ...