HIGH-LEVEL PRIVACY PROTECTION: Door peepholes can increase your privacy. Outside visitors cannot see your home from the outside perspective, providing you with high-level privacy protection and security. privacy. 200 DEGREE CLEAR ANGLE OF VISION: The optical glass lens can provide panoramic images and you can easily see the whole surrounding area from the top of the head to the feet of people standing outside. EASY TO INSTALL: Applicable door thickness: 35mm-55mm, security peephole is suitable for doors, wooden doors, security doors and doors fireproof. STURDY AND DURABLE OBSERVATION COVER: Door viewer can protect your home from theft, invasion and home invasion, prevent the loss of your belongings and ensure the safety of visitors behind the locked door. INTERIOR COVER RE GLABLE: Simply close the lid when not in use to prevent outside strangers from spying on your home layout, and you can open it for identification when an unknown person knocks on the door door.