Lightinthebox 7 Inch Color Video Door Phone System with Alloy Weatherproof Cover Camera Aluminum alloy panel of indoor unit, fashionable and luxury. Water and oxidation-proof, durable aluminum alloy made outdoor station. 7 inch color TFT LCD. No radiation, low power consumption and high definition. Handfree intercom.Electric lock-control function. Monitor the view out of the door. 16 kinds of rings for your options. Volume, brightness and contrast adjustable. With swithch-adapter and 5m cable, users could install it by themself.