1. 1080P HD and Wide Angle: The peephole camera with HD lens, can capture 1080P HD video, clearly record every picture, rich in details, 150 ° wide angle lens allow you can see all the visitors face details. 2. With APP: When door viewer is connected to WIFI, you can remotely view the situation in front of the door through APP, when someone passes by the door, camera will send a notification to the mobile phone in time, to protect your security. 3. Sturdy Lens: The peephole camera shell is made of aluminium alloy with strong erosion resistant, and the lens is also reinforced with hard glass, which is able to avoid intentional destruction by human beings. 4. Security: Using the remote peephole doorbell, you don't have to risk going to the door to check on the situation, you can use your cell phone to check on the crowd outside the door to keep you safe. 5. Suitable Doors: Camera supports the maximum door thickness of 2‑5.7CM (0.2CM error), the opening width needs to be 12‑18MM (2MM error), at the same time to meet the two conditions can be perfectly installed! Specification: Item Type: Wifi Door Peephole Camera Resolution: 1920*1080 Lens Angle: 150° Connection Mode: Mobile APP Storage: Cloud+Memory Card Memory Card Expansion Size: 128G (memory card not included) WiFi Version: 5.0GHz Recording: Support Maximum Thickness of Door: Approx. 2 - 5.7cm / 0.8 - 2.2in (0.2CM error) Opening Width Required: Approx. 12 - 18mm / 0.47 - 0.71in (error not more than 2MM) Camera installation method and requirements:  1. The maximum thickness of the door plate supported by the camera is 2‑5.7CM (with a 0.2CM error margin), and the width requirement of the peephole is 12‑18MM (with an error of no more than 2MM).  2. Rotate and unscrew the lens fixing ring at the front end of the ca