I Function and description 1． Assembly behind the door viewer. 2． When doorbell ringing, push the switch on Door scope monitor and visitor?s image displayed on screen. 3． Silicon switch, push it easy and has not any sound. 4． Door viewer is shielded by Door scope monitor, visitors could not feel any one in home from door viewer. 5． Assembly on door with magnet, so it is easy to assembly and you could take it off from one site to another site. 6． High capacitor rechargeable Li-on battery. 7． With additional high quality adaptor. 8． Fashion new style and colors to favorite your requirements 9． Special designed lens to fit all kind of door viewer 10． Qualified by UL,CE,PSE,BS,3C etc. II Specifications 1． Size: 105X55X25 2． Camera: CMOS sensor 1/5? 300,000 pixels 3． Display: 1.5?TFT LCD 4． Power: Battery, 3.7V, 900mAh Adaptor, INPUT 100V-240V OUTPUT 5V, 700mA 5． Shell: Plastic material PC