Feature:1. With a 4.5 inch high definition LCD screen and a camera with 1MP, you can clearly see the visitor's face on the screen.2. 135 degree high definition wideangle, with night vision function, you can see clearly at night.3. Intelligent motion detection and recognition, automatic recording and recording; support video playback, adjustable focal length.4. Maximum support 32G card, intelligent identification, automatic cycle coverage according to time.5. Automatic storage technology, and support visitor video message, let you watch anytime and anywhere you want.Specification:Item Type: Video DoorbellMaterial: ABSColor: As shown in the pictureProduct Size: Approx. 135x76x15.5mm / 5.31x2.99x0.61inWeight: Approx. 360g / 12.7ozBattery Parameters: 3.7V lithium battery 2500MAH (included)Door Hole Range: 16-44mm / 0.63-1.73inDoor Thickness Range: 35-105mm / 1.38-4.13inLanguage: 11 languages, including ChineseFunctions: Motion Detection and recognition, taking pictures, video recording, night vision functionsCamera Pixel: 1MPPicture and Video Specifications: 720P.Package List:1 x Doorbell1 x Door Viewer1 x USB Cable1 x Accessory1 x Lithium Battery1 x Bag of Screw(6pcs)1 x English ManualNote:1. Please allow 12in 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.