Cover overs your webcam when not in use, just slightly sliding can open or close, and prevents web hackers from spying on you. It is perfect to provide privacy, security and peace of mind to individuals, groups, organizations and companies. Measuring only 0.03 inches thick, therefore allowing laptops to close perfectly. Does not interfere with web use or indicator light. It does not damage your device, the glue easy to take away when not use.