Item Type: Visual Door Viewer_x000D_ Model: DD1S_x000D_ Display Screen: 2.8 Inch Color Display Screen_x000D_ Display Resolution: 320 x 240_x000D_ Power Supply: 4 x AAA Battery (battery not included)_x000D_ Image Sensor: 1MP_x000D_ Camera Pixel: 1MP_x000D_ Support Door Thickness: Approx. 40-100mm / 1.6-3.9in_x000D_ Support Door Aperture: Approx. 14-28mm / 0.6-1.1in_x000D_ Large Viewing Angle: 90 Degree 1SMART DOOR VIEWER: Smart visual door viewer kit, including 1MP peephole camera and monitor, can monitor the outside through the indoor unit. 2CAMERA SPECIFICATION: The peephole camera adopts 1MP image sensor with a 90 degree super large viewing angle, increasing the visual range. 3MONITOR SPECIFICATION: This monitor adopts a 2.8 inch color display screen with a resolution of 320x240, clear and intuitive, and easy to operate. 4APPLICABLE DOOR: This peephole viewer is suitable for doors with a thickness of 40?100mm and aperture of 14?28mm, easy to install and use. 5BATTERY POWERED: The electronic door viewer monitor is powered by battery (not included) to ensure long standby, and can be used at any time. 1 x Door Viewer 1 x Monitor 1 x User Manual 4 x Screws