Functionnew and high quality.Suitable for door thickness 60mm90mm, suitable for wooden, fiberglass or metal doors.Easy to install, replace your door indicator in 5 minutes without tools.The lens protects your home against burglary, intrusion and home invasion.220 degree viewing angle provides the security to identify visitors behind a locked door,You can easily see the entire surroundings from the top of the head to the feet of someone standing outside.A solid, heavyduty privacy screen increases your privacy. With the screen in place,visitors outside cannot see through the peephole into your home,which provides the highest possible privacy for your protection and securitySpecificationColor Silver, Gold, Bronze,Material ABS plastic,Suitable for opening diameter 16mmSuitable for door thickness 60mm90mmDegree 220NotePlease allow 13cm error due to manual measurement and make sure you do not mind before ordering.Please note that colors may vary depending on the placement of the image.The package contains1doorbell