Feature:1. 2.4in Screen: 2.4 inch ultra bright TFT LCD display greatly presents extremely clear and accurate scenes.2. 145 Wide Angle: There is no blind spot, 24hour security monitoring to ensure the safety of you and your family.3. Night Vision: LED lights will automatically turn on in the dark, allowing to see abnormalities outside the door at night.4. Power Supply: The premium door bell is powered by 3pcs AAA batteries (not included), avoiding frequent charging.5. Function: Easy to install and use, avoid unnecessary disputes caused by others invasion.Specification:Item Type: Video DoorbellMaterial: ABS + Zinc Alloy Use: HouseholdBattery: 3pcs AAA batteries (not included)USB Power Input: DC5VScreen Size: 2.4inPixel: 720PViewing Angle: 145 degree wide angleNight Vision Function: SupportCamera Function: SupportVideo Function: SupportStorage: Support up to 32G storage card (not included)Support Door Thickness: Approx. 35-110mm/1.4-4.3inSupport Door Hole Size: Approx. 14-50mm/0.6-2.0inSupport Languages: Chinese, English.Package List:1 x Inside Machine1 x Outside Door Viewer6 x Screw1 x Fixed Plate1 x Manual