Feature:1. Smart Door Viewer: With a 120 degree view angle and sturdy aluminum front panel, this doorbell can prevent potential damage. Its water resistant feature allows for clear infrared images day or night, no matter the weather or time of day.2. Indoor Communicating Monitoring: When someone presses the call button on the outdoor unit, you can see and talk to anyone at your doorstep. With the doorbell, you can safely and comfortably open the door at home.3. Night Vision Infrared Function: Featuring 850nm infrared, it provides a clear vision up to 5m and ensures home security. IR night version clear images no matter the weather or time of day or night.4. Long Battery Life: With a high capacity of 4 x 3A batteries, this doorbell offers an extended battery life to avoid frequent charging. (Batteries not included)5. Premium Material: Made of ABS and zinc alloy, this visual doorbell provides a wide angle view of 120 and features a 300K pixel CMOS active digital image sensor for clear visuals.Specification:Item Type: Door Peephole Viewer CameraProduct Material: ABS, Zinc AlloyUse: Visual DoorbellWide Angle: 120Sersor: 300K Pixels CMOS Active Digital Image SensorMemory Card Slot: Up to 32GB (Shipped Without Card)Preview: Press The Preview Button to Preview Video Or Photos On The DevicePower: 4 x 3A Dry Batteries (shipped Without Batteries)Accommodates Door Holes: 1435mm/0.6-1.4inDoor Thickness: 35100mm/1.4-3.9inDisplay Size: Approx. 7.5x10cm / 3.0x3.9inPeephole Viewer Diameter: Approx. 6.5cm / 2.6inGross Weight: 342g/12.1oz.Package List:1 x Display1 x Peephole Viewer1 x Chassis Accessories6 x Screws1 x Instruction ManualNote:All data are measured manually, and there are certain errors in the measurement results.