- Versatile Compatibility : Designed for door thicknesses between 35 mm and 55 mm, this door viewer fits seamlessly into wood, fiberglass, or metal doors. - Hassle-Free Installation : Upgrade your door viewer in just 5 minutes—no tools required. Simple instructions make replacing your existing viewer quick and straightforward. - Enhanced Security : Equipped with a protective lens, this viewer enhances your home's security by preventing potential burglaries and invasions. Feel safer knowing you can see who's at your door before opening it. - Wide Viewing Angle : With a 220-degree field of view, you can easily identify visitors, delivery personnel, or any unexpected guests without the need to open the door. Enjoy peace of mind with a clear line of sight. Use Scenarios : 1. Perfect for homeowners looking to increase security while keeping an eye on unexpected visitors. 2. Ideal for multi-family units where residents need to verify their guests from inside the apartment. 3. A useful accessory for businesses wanting to enhance customer security while maintaining a welcoming environment. Choose this door viewer today for an easy-to-install, reliable solution that combines safety with functionality.