Easy to Install: Suitable for 1-3/5 to 2-1/6inch (40mm-55mm) thick doors, drill 1.1-1.42inch(28-36mm) diameter hole in a proper position, insert the viewer into the hole then screw two sides together.. Wide Angle: 220 Degrees wide viewing angle. It provides a clear view with an extraordinary wide-angle coverage.. Rotating Cover: With the cover in place, people outside cannot see the inside of the house, which is safer.. Application: Perfect for home, office, hotel, and front door where you need to see, monitor who is outside when the doorbell rings..
