Feature:1. 180 Days long standby time, designed with builtin memory and no need for inserting storage card.2. 2.4inch Display screen and 90 degrees visual angle, suitable for home use and having clear image display.3. 300,000 Pixel high definition camera and designed with 2pcs 850nm infrared night vision lamp, convenient to use.4. Come with USB cable of the package, easy and convenient for charging and with screws for easy installation.5. Builtin memory can store about 80pcs photos and including manual of the package for simple using.Specification:Item Type: Door ViewerMaterial: Plastic + electronic componentsMonitor Size: Approx. 8 x 8 x 2cm / 3.1 x 3.1 x 0.8in (1-2cm)Camera Size: Approx. 6 x 6 x 5cm / 2.4 x 2.4 x 2in (1-2cm) (without wire)Camera Cable Length: Approx. 15.5cm / 6.1in (1-2cm)Monitor Battery Model: Lithium Battery (Included)Monitor Battery Capacity: 600mAhLanguage of Menu: Chinese/EnglishDoor Hole Diameter: Approx. 14 ~ 28mm / 0.6 ~ 1.1inApplicable Door Thickness: Approx. 35 ~ 120mm / 1.4 ~ 4.7inInfrared Night Vision: 2pcs 2 850nm infrared night vision lampsRecord Mode: Take photosVisual Angle: 90 wide AngleLens Pixel: 300,000 High definition cameraScreen Size: 2.4-inch LCD screen Doorbell: SupportedCharacteristics: Built-in memory/circular storage.Package List:1 x Camera 1 x Monitor 1 x USB Cable 3 x Screw 1 x Manual