Feature:1. HD Display: Upgraded 3.5inch IPS HD color display with 960x240 screen resolution to bring you clear and rich images.2. Power Supply: Powered by 3 x AA batteries (not included), EEPROM data storage method, no loss of stored data after power failure, supports USB power supply.3. Intelligent Recognition: When the TF card is full, new photos will automatically overwrite the earliest ones in chronological order and automatically save the most recent photos or videos.4. Performance: Integrated design, compact structure, high reliability, ABS and zinc alloy material, IP55 protection class, beautiful and durable.5. Easy Using: The doorbell is installed at the location of the viewer hole on the door, which can display the image outside the door clearly on the screen of the host in the door, making the owner can see the visitors outside the door at home.Specification:Item Type: Smart Video DoorbellMaterial: ABS and zinc alloyBattery: AA battery x3 (without battery)LCD Screen Type: 3.5inLCD Screen Resolution: 960x240TF Card: Maximum support 32G(without)Pixel: 1MPMinimum Illumination: 0.5Lux/F2.0 color), 0.02Lux/F2.0(black and white)White Balance: Automatically tracks white balanceGain Control: AutomaticSignal to Noise Ratio: Greater than 50dBBacklight Compensation: AutomaticElectronic Shutter: 1/4-1/10,000sNight and Day Mode: Filter color to blackFocal Length: 2.4mmHorizontal View: 100Aperture Number: F2.0Automatic Shutdown: 15 secondsManual Capture: 1Power Off Memory: SupportedStandby Current: 100UAProtection Level: IP55Installation: Screw hanging plateApplicable Door Thickness: Approx: 35-110mm/1.37-4.33inApplicable Door Viewer: Approx: 15-25mm/0.59-0.98in.Operating Temperature: -30-65(outdoor)/ -10-50(indoor)Package List:1 xScreen 1 x Smart Digital Door Viewer 1 x Mounting Plate 8 x Screw 2 x Gasket 1 x User Manual Note:1. Please allow slight error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.