HIGH LEVEL PRIVACY PROTECTION: Door peepholes can increase your privacy. Outside visitors cannot see your home from the outside, providing you with high level protection and security. 200 DEGREE CLEAR VIEWING ANGLE - Glass lenses can provide images panoramic and you can easily see the whole environment from the top of the head to the feet of the people outside. EASY TO INSTALL: Applicable door thickness: 35mm-60mm, suitable for doors, wooden doors, security doors and fire doors. STURDY AND DURABLE OBSERVATION COVER: Door Eye Viewer can protect your home against burglaries, invasions and home invasions, prevent loss of your belongings and ensure the safety of visitors behind the locked door. ADJUSTABLE INSIDE LID - You only need to close the lid when it is not used to prevent it from being spied on by outside strangers on your home layout, and you can open it for identification when an unknown person knocks at the door.