Wided Used--Modern security door viewer and door peephole 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. Ultra HD Lens---High quality optical lens with 200-degree visual angel offers a crystal clear view with an wide angle coverage. From the inside, viewing a person standing near the door, you can view the top of the head down to about waist level. It offers the highest quality security for you and your family. Increase Privacy--The thickening cover with a push bottom is more sturdy and an-peeping, increases your privacy. With the cover in place, visitors outside cannot see through the viewer into your home, offering the highest level of privacy for your protection and safety. Built To Last-- This door-viewer is what you're looking for. Constructed from Durable Zinc alloy, is rustproof and sturdy, leads for a very long durability and lifespan.Available in black, gold and silver. Install Easity--Adjusting the thickening and deepening thread, the door peep hole wide angle fits most of doors. Suitable for 1.57" to 2.48"(40mm-63mm) thick doors, simply drill a suitably positioned 0.63" diameter hole, insert the peep hole into the hole then screw the two sides together and tighten by hand.