WiFi Repeater is based on IEEE 802.11 a/b/g/n standard. It extends the coverage range supported by a wifi router to larger region usually between two rooms. Wifi repeater operates either in 2.4 GHz or 5 GHz band as supported by WLAN standard. 2.4 GHz supports 14 frequency channels spaced at 5MHz apart.

Wifi router operating at 2.4 GHz receives signal at one channel frequency (say 2412 MHz) and transmits it on another channel frequency (say 2422 MHz) after necessary amplification as per designed specification.

WiFi repeater is used to extend the coverage range of wifi compliant devices. Due to this feature, it is also known as wifi range extender. Wifi devices support the specifications defined in the IEEE 802.11 standard. There are various WLAN series of standards which includes 802.11a, 11b, 11g, 11n, 11ac, 11ad etc.