1. 3.5-inch color LCD screen. 2. OV industrial high-resolution color image sensor. 3. 120-degree true viewing angle. 4. Security peephole provides more reliable protection for your home and improves your quality of life. 5. Ultra-thin chassis, elegant and beautiful. Specifications: Features: 3.5-inch LCD color screen. Industrial OV high-resolution color image sensor. 120-degree true viewing angle. Security peephole provides more reliable protection for your home and improves your quality of life. Ultra-thin chassis, elegant and beautiful. Easy to install in 3 minutes, no need for installers or special tools, saving time, effort, and money. Specifications: Type: Digital Security Doorbell Peephole Material: Zinc Alloy Type: Digital Doorbell LCD Display: 3.5-inch Sensor: 2 mega CMOS sensor True Viewing Angle: 120 degrees Function: Energy saving, low power warning Power Supply: 4 AAA batteries (not included) Door Hole Range: 14-28 mm Door Thickness: 35-100 mm Power Supply: 4 AAA batteries Door hole diameter: 14-28 mm Door thickness: 35-100 mm Indoor unit size: 120x62x20mm Diameter (outdoor camera): 30 mm Net weight: 197g Package List: 1 x Outdoor Unit 1 x Indoor Unit 1 x Bag of Screws 1 x Metal Bracket Note: Please allow 1-3cm differences due to manual measurement. This product does not support night vision. Thank you for your understanding. Please note that the new type and the old type of this product will be sent randomly, and make sure you don't mind before ordering. When connecting the indoor camera, it should be connected from the cable groove. Otherwise, it will show that the camera is incorrectly connected.