Increases Privacy - Heavy Duty Privacy Cover Provides Top Privacy and Security-With the cover in place, no one from outside can see through the viewer into your home even with the reverse peephole. No light will beam through the hole to disturb you anymore with this nice touch. You can open and close the heavy duty back cover flexibly and smoothly. It allows you to identify visitors from a locked door, offering the highest level of privacy for your protection and safety.Purchase with confidence - Five colors to choose,easy to install.Ultra HD Optical Glass Lens - High quality optical lens with 200-degree visual angel offers a crystal clear view with an extraordinary wide angle coverage. You can easily view the entire surrounding area from the top of the head to the feet of someone standing outside. It offers the highest quality security for you and your family.Easy to install - The door viewer with durable Zinc Alloy and Solid Brass metal with super simple installation. Suitable for 40mm/1.57 inches to 60mm/2.36 inches thickness doors, simply drill a suitably positioned 16mm/0.63 inches diameter hole, insert the viewer into the hole then screw the two sides together and tighten by hand.After installed it, you could see a lot of the area.Wide Applications - Modern security door viewer and peep hole for doors. Perfect peephole for home, office, hotel and front door where you need to see, monitor, spy and peeking who is outside your door when the doorbell rings before opening, providing you extra privacy and safety. A must complement for any intercom system, security door monitor, door accessories.