1, Even if the night also can see images 2, It is more convenient to operate 3, The intercom ringing 4.Video door phone. 2012 New Video Door phone ,video doorbellFoshan bright new visual intercom system1. Rigid water proof metal casting machine at the doorway, highlight the level and taste, highlight international quality, classic design, can place name or number, with rainproof cover.2. Using ...