Feature:1. Visual Intercom Doorbell: The outdoor camera is equipped with a rainproof cover, infrared sensor, and 90 wide angle camera for clear nighttime vision. Extend monitoring to front door, garden, and upstairs with wired connection.2. Clear Sound Quality: Support handsfree and handset calling with clear voice and good sound quality. Easily adjust brightness, volume, contrast, and choose from 25 ringtones. Support electric unlocking, and external view monitoring.3. Easy Monitoring: Intercom doorbell system allows you to easily view outside situation, 2 way intercom, call unlock for quick and convenient access. Support answer, listen, unlock functions with simple 4 wire setup and easy wall mount installation.4. High Definition Camera: This kit includes 1 outdoor high definition camera and 1 indoor color screen. 90 degree wide view angle, high clarity for seeing and talking to visitors. Stylish and aesthetic design.5. Stable Connection: Wired connection for clear home security vision, surface mount via easy 4 wire setup. Use indoor screen for remote unlocking of electric doors or locks. Suitable for apartments, villas, hotels, offices, and public buildings.Specification:Item Type: Video Doorbell Intercom SystemMaterial: ABS, MetalIndoor Unit:Function: Intercom, Hands free, Monitoring, Unlock, Adjust Brightness Color VolumeScreen Size: 4.3in TFT LCDResolution: 480x272Ringtones: 25Output: DC 15V 1500mAInstallation: Surface MountConnection Distance: Approx. 100m / 109.4ydOutdoor Unit:Camera: 1.0MP 1/4in CMOS, 3.6mm LensNight Vision: 4 LED Infrared LightsBest Night Vision Distance: Approx. 0.2-1.0m / 0.66-3.28ftCamera Angle: 90 degreesOperating Temperature Range: -30-+60Installation Method: Surface MountWiring Method: RVV4 Core Wire Connection.Package List:1 x Outdoor Unit1 x Indoor Unit1 x Power Adapter7 x Screws7 x Screw Accessories3 x Terminal Line1 x Test Line1 x Mounting Plate1 x Manual Tool Kit (Wrench x 1, Screw x 1)2 x English User Manual