3.5 Inch Doorbell Digital LCD 120 Degree Peephole Viewer Photo Visual Monitoring Electronic Cat Eye Camera Doorbell|Doorbell(black) Features: 3.5-inch LCD color screen. OV Industrial High Definition Color Image Sensor. 120 degree actual viewing angle. 24 hours monitoring. Ultra-thin body, stylish and beautiful. Cat eye hole, suitable for any door thickness. Easy to learn to install in 3 minutes, no need to install workers, no special tools, saving time and effort and saving money. Specification: Type: magic eye Material: Zinc Alloy Type: Digital Doorbell LCD screen: 3.5 inch Sensor: 2 Mega CMOS Sensor Real view angle: 120 degree Function: Energy saving, Low Power Alert Power supply: 4pcs AAA batteries (not included) Door Hole Range: 14-28mm Door Thickness Range: 35-110mm Keyword: digital door viewer Power source: 4pcs AAA batteries door hole diameter: 14-28 mm Door Thickness: 35-110 mm Indoor device size: 120x62x20 mm Diameter (camera outdoors): 30 mm Net weight: 200g Package List: 1 x Outdoor Unit 1 x Indoor Unit 1 x Pairs of Screw