Features: 1.7inch Color TFT: 7 inch color TFT, no radiation, low power consumption, high definition, clear picture, 100?240V voltage. 2.Night Vision Infrared Camera: Night Vision Infrared Camera, even at night, you can easily monitor, electronic lock control function. 3.25 Kinds of Doorbells: 25 kinds of doorbells, you can pick your favorite doorbell sound, hands free intercom microphone, you can monitor the outside of the door. 4.Adjustable: Volume, brightness and contrast can be adjusted to facilitate your operation and meet your different needs. 5.Easy Installation: With the adapter and cable provided in this kit, you can easily install it without taking too much of your time. specification:Item Type: Video Door Phone Doorbell Material: ABS, Aluminum Alloy Resolution: 480xRGBx234 Voltage: 100-240V Call Duration: 120s10% Monitoring Duration: 60s10% Effective Distance: Approx. 50meters / 164ft Power Consumption: Static