Features: Durable rain-proof aluminium alloy outdoor machine, anti-oxidation, not easy to rust. 7 inch color TFT screen, no radiation, low power consumption and high definition. Night vision infrared camera can also provide a clear picture under low illumination. Hand-free intercom and mute indoor intercom function, so that you and visitors outside the door to achieve easy intercom. The adapters and cables provided in the accessories allow you to install them easily. Volume, brightness and contrast are adjustable. 24 hours for you to monitor the outside, to ensure that you and your family's personal and property safety. There are 25 kinds of doorbells for your choice. / Electric lock control function. Specifications: Plug: US 100-240V Indoor Viewer: Screen: 7 inch TFT Power supply: AC100V-240V/50-60Hz Valid pixels: 480 * 234 * 30 Wiring: 4 lines Power: