Video door phones 1. 7" tft lcd display with low power consumption and high definition, no radiation. 2. Hands-free intercommunication. 3. Electric-controlled unlocking. 4. With muilti-function:call in, call out, intercom, monitoring outdoor. 5. Led light or ir for night vision. 6. 16 chord melody rings for option 7. Brightness, volume and chroma are adjustable. 8.Intercom function, suitable for the office, residential and other places to install 9.Easy installation for diy market. 10.Accessories:one protection cover for the outdoor unit, 1pcs of 10meter cable , 1pcs of installation manual, 2pcs of mounting bracket , one small bag of screws. One outdoor camera can be connected up to five indoor monitors with one switch. Two or three outdoor cameras can be connected up to five indoor monitors with one switch. One outdoor camera be connected one or two indoor monitors, it's not need switch.