Feature:1. 4 WIRE VIDEO INTERCOM SYSTEM: 7 inch color LCD indoor display with simple operating system, slim design and stylish touch buttons. Outdoor doorbell with HD camera, 120 degree wide angle view, 1/4 HD CMCS, night vision auto fill light, rainproof and vandal resistant design.2. INDOOR INTERCOM DISPLAY: When someone presses the call key on the outdoor unit, you can see and talk to anyone who comes to your door. The door lock allows you to open the door safely and easily from your home.3. IR NIGHT VISION AND REMOTE UNLOCKING: The outdoor camera has 6 built in IR LEDs, allowing you to see outside day or night, making your home safer. Support ic card unlocking, indoor unit unlocking, and you can also control the electric locks, electric bolt locks, and electromagnetic locks.4. MULTIFUNCTIONAL INTERCOM SYSTEM: Built in various doorbell ringtones; Adjustable volume, brightness and contrast; Infrared night vision camera; Electric lock control function; Speakerphone; Auto shut off.5. WIDE APPLICATION: Video intercom system is suitable for use in various places such as villas, families, offices, office buildings, government departments and other places.Specification:Item Type: Wired Video Intercom SystemCamera Parameters: Lens: 1/4 High definition CMOSResolution: 800 lineIllumination: 0.02 LUXLight Source: 6 IR LEDPower Supply: From DisplayDisplay Parameters: Screen: 7 inchResolution: 800x480Voltage: DC15V/2AVideo Input: 1Vp-p 75 OhmRingtone: 16x4 melodiesDisplay Time: Intercom 60s and Display 30sPower Consumption: Standby 0.2W, Working 8WConnection Method: 4 wireInstallation: Wall mounted .Package List:1 x Outdoor Unit2 x Indoor Units12 x Screws12 x Expansion Tubes4 x Mounting Patches6 x Connecting Wires2 x Adapters1 x User Manual