General description This Visual Door Viewer Smart Peephole Camera Doorbell features a 2.8 inch LCD display and an HD lens, providing a clear view of visitors outside your door. With its infrared night vision capability, it ensures you can see who is at your door even in low light conditions, enhancing your home security. Technical specifications Screen Size: 2.8 inches Screen Resolution: 320x240 Viewing Angle: 90° Camera Pixels: 2 million pixels Internal Memory: Can store up to 90 photos Power Supply: 4 x 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 Usage This smart video doorbell allows you to observe visitors clearly and has a built-in memory that automatically