Ultra HD Lens: High quality optical lens with 220 degree visual angle that provides crystal clear vision with extraordinary wide angle coverage. You can easily see the entire surrounding area from the top of someone's head to their feet outside. It provides premium security for you and your family. Increase Privacy: The whole design is anti-destruction, anti-drag, and the thick cover is more sturdy and attractive, increase your privacy. With the cover in place, visitors outside cannot see through the viewer into your home. Used to allow the user to identify visitors from the security of a locked door, providing the highest level of privacy for your protection and security. Easy to Install: The door peephole is made of durable solid brass with super simple installation. Suitable for doors 1.5" to 2" thick. Simply drill a 5.75" diameter hole, insert the visor into the hole then screw the two sides together and hand tighten. After installation, you can see a lot of area. Wide Use: Modern