- Effortless Installation: Designed for doors 35mm-55mm thick, this door viewer can be installed in just 5 minutes. Simply drill a hole, insert the viewer, and screw the back cover in place—no tools needed. - Enhanced Privacy: The built-in back cover prevents unwanted peeping, ensuring your home remains private and secure. - Wide Viewing Angle: With a 220-degree field of view, this door viewer allows you to clearly identify visitors without opening the door, enhancing your security against potential threats. - Durable and Reliable: Crafted with quality materials, this door viewer is built to last. Enjoy peace of mind with our 12-month exchange guarantee. If you encounter any issues, reach out to us for assistance. Practical Applications: 1. Home Security: Ideal for families wanting to screen visitors from the safety of their home. 2. Apartment Living: Perfect for renters who need a quick, tool-free solution for enhanced security. 3. Office Use: A great addition to office entrances, allowing staff to verify visitors before granting access. This door viewer combines functionality with user-friendly design, making it an essential addition to your home's security features.