Item Type: Video Doorbell Material: ABS Weight: Approx. 960g / 33.9oz Camera (Outdoor): Camera: 1/4 HD CMOS Light Source: 6 Infrared Lamps Resolution: 800x600 Monitor (Indoor): Resolution: 800x480 Wiring: 4 Wire Package List 1 x Indoor Display 1 x Outdoor Doorbell 1 x Outdoor Doorbell Rain Cover 3 x Connection Cable 8 x Expansion Screw 9 x Metal Screw 1 x Plug 5 x Unlocking Card 1VISIBLE INTERCOM: You can see, hear and communicate with anyone at your door when someone presses the call button. Simply press the "unlock" button on your interior doorbell to welcome your visitors. 27 INCH TFT DISPLAY: You can easily adjust the brightness, volume, contrast and a wide selection of ringtones through the display, as well as watch what's going on outside your door. 3IR NIGHT VISION: The camera comes with a rain cover, which can effectively prevent rain and vandalism. Built in infrared sensor and 120 wide angle camera, you can see visitors clearly even in dark night. 4MULTIPLE DEVICE INTERCONNECTION: Multi device connectivity is possible, with all monitors able to see, hear, talk to the outdoor doorbell and unlock the door. 5WALL MOUNTING, WIDELY USED: Wired connection with stable signal, equipped with adapter, rain cover, mounting bracket, 4 core wire, screws and other accessories, can be used in apartments, villas, hotels, offices, public buildings.