Features 1、Clear Image Quality: Equipped with a 1 MP CMOS sensor, this doorbell's camera catches crisp images and functions well in low light conditions, although it is not HD or night vision. Adequate lighting (e.g. night light) required for viewing subjects. 2、Large Screen, Clear Image: Featuring an OV industrial color image sensor and a 3.5 inch LCD color screen, this doorbell ensures clear image display for enhanced visibility. 3、User Friendly Interface: The 3.5 inch LCD color screen provides a user friendly interface that is easy to navigate, allowing for effortless viewing and operation of the doorbell system. 4、Easy Installation: Comes with necessary parts and instructions for easy setup, simply short press to open, long press to close. Battery replacement doesn't require disassembly of main unit and peephole, providing 24 hour viewing. 5、Ideal Replacement: Wonderful replacement for the old and damaged parts, fine workmanship, attention to details, helps you improve safety levels! Specification Item Type: Digital Door Viewer Material: ABS Display Screen: 3.5 inch LCD color screen, resolution 480 x 320 Sensor: 1MP camera resolution Field of View: 120° wide angle Door Hole Range: Approx. 14 to 28mm / 0.55 to 1.1in Door Thickness Range: Approx. 40 to 100mm / 1.57 to 3.94in Keywords: Digital Door Viewer Power Supply: 4 x AAA batteries (batteries not included) Door Hole Diameter: Approx. 14 to 28mm / 0.55 to 1.1in Door Thickness: Approx. 40 to 100mm / 1.57 to 3.94in Dsiplay Size: Approx. 118 x 62 x 20mm / 4.65 x 2.44 x 0.79in Diameter (Peephole): Approx. 32mm / 1.26in Package List 1 x LCD Display 1 x Door Viewer 4 x Screws 1 x User Manual