General description This Visual Door Viewer Smart Peephole Camera Doorbell features a 2.8 inch LCD display and infrared night vision, providing enhanced security for your home. With its HD lens and wide viewing angle, you can easily observe visitors outside your door, ensuring peace of mind. Technical specifications Screen Size: 2.8 inches Screen Resolution: 320x240 Viewing Angle: 90° Camera Pixels: 2 million pixels Storage Capacity: Can store 90 photos Battery: Powered by 4 AAA batteries (not included) Door Peephole Compatibility: 14-30mm (0.55-1.18in) door thickness Door Thickness Compatibility: 35-110mm (1.38-4.33in) Indoor Unit Size: 127 x 67 x 17mm (5 x 2.64 x 0.67in) Outdoor Unit Size: Diameter 57mm (2.24in) Compatibility and accessories Includes 1 x Outdoor Unit Includes 1 x Indoor Unit Includes 4 x Screws Includes 1 x User Manual Installation Installation is straightforward with the included screws and user manual, allowing you to set up the device quickly and easily. Usage