1. Visual Intercom System: Enhance the security of your home with the ability to see, hear, and talk with anyone outside when the call is pressed. Easily welcome your visitors by pressing the unlock on the indoor screen. 2. 7 Inch TFT Display: The system features a 7 inch TFT display that allows for easy adjustment of brightness, volume, contrast, and a variety of ringtone selections, providing a clear view of the external surroundings. 3. Infrared Night Vision Camera: Equipped with a rainproof camera cover and a impact resistant design, the camera features built in infrared sensors and a 120 degree wide angle lens, ensuring clear visibility of visitors even in pitch black darkness. 4. One to One Interconnection: Enable one to one connection where all screens can view, hear, talk with the outdoor doorbell, and unlock the door. The indoor unit offers flexible unlocking methods, including unlocking with a card, providing added convenience. 5. Wall Mount: The wired connection ensures stable transmission, and the system comes with an adapter, rain cover, mounting bracket, 4 core cable, screws, and other accessories for easy installation on walls. Suitable for use in apartments, villas, hotels, offices, and public buildings. Specification: Item Type: 7inch Color Video Doorbell Material: ABS Outdoor Camera: Camera: 1/4 HD CMOS Light Source: 6 Infrared Lights Resolution: 800x600 pixels Indoor Display: Resolution: 800x480 Wiring Method: 4 wire How to Use: See instructions Package List: 1 x Indoor Unit 1 x Outdoor Unit 4 x Connecting Line 6 x Expansion Screws 7 x Metal Screws 1 x Screw 1 x Plug 2 x Doorbell White Card 3 x Keyring Card 1 x Manual