It is a computer networking system. It performs as a repeater in-between computers and wireless routers. It is used when one computer is far from the place having different wireless running points. If you arrange it properly it will raise the ambit of local wireless networked-WRT and establishes home based network routers to performs as wireless repeaters.
The security characteristic for the wireless repeater is its wireless network key which is an heightened feature that blocks unauthorized visitors from assaulting the wireless network. It can be just be operated by password. There are various wireless networks which are however unprotected against hackers and viruses.