wifi repeater works by receiving the Wifi signal from a router and then amplify and rebroadcast it around locally. With a wifi repeater Computers and printers that located out of the orginal range of access point can access the extended wifi network. Wifi repeater effectively doubles the coverage area of your existing Wifi network， extend your network to the far end of your home or office， you just need to place it half way between the computers and router.USE REQUIREMENT:01.110 ~ 230-volt socket02.The WLAN client must support at least the WPA encryption standard.03. WLAN access point and the WLAN client with automatic IP address assignment (DHCP)04.Forwarding of IPv4-based protocols/Address Resolution Protocol05.The network name (SSID) of the WLAN access point must be set to "visible".06. WLAN access point/client according to IEEE 802.11n， g， b.