Feature: 1. LCD Display and Waterproof: This video doorbell has a ultra thin LCD display with HD color display, no radiation and low power consumption. And it has IP55 waterproof for easy to apply at home. 2. Practical Features: Infrared night vision is for clearly view at night. 25 kinds of doorbell ringtones can be switched with you. Volume, brightness and contrast can be adjusted. 3. Two Way Intercom: Supporting two way intercom, this video door phone enables real time video calls between people inside and outside the door. 4. Electronic Lock: Equipped with electronic lock control, this smart doorbell has a delayed unlock function. Universal design makes it suitable for most of the electronic locks on the market. 5. Easy Installation: With the adapter and cable provided in this kit, you can easily install our video door phone. It can be used by directly after connecting to the applicable power. Specification: Item Type: Video Door Phone Material: ABS, aluminum Weight: Approx. 1621g/57.18oz Size: Indoor Monitor: 18.2x12.2cm/7.17x4.80in Bell:15.5x10.2cm/6.10x4.02in Resolution: 800x480 Camera: 1/4 inch HD color CMOS can reach 700 lines Camera Lens: 3.6mm Camera View: 92 degrees Call Duration: 120 seconds Monitoring Duration: 60 seconds Power Consumption: Static 0.5W Power Output: DC15V Waterproof: IP55 Use: Home. Package List: 2 x Indoor Monitor1 x Doorbell2 x Power Plug7 x Color Cable2 x White Cable20 x Screw1 x Hex Wrench1 x Black Accessory16 x Green Expansion Tube1 x Instruction Manual