A lot of broadband routers are single band usually 2.4 GHz if you like me have a couple a lap top a couple of tablets and phones camping on the same band things can get really slow even if you have high speed broadband. This device removes the problem of congestion by spreading the load over two bands one at 2.4 GHz and one at 5 GHz your wireless card will show you the best signal and allow you to spread your device's across both bandwidths.