Tri band routers transmit WiFi signal on 3 different frequencies: on the 2.4GHz band, and on 2 separate 5GHz bands. If you're going online with your laptop, game console, or tablet, the WiFi router automatically connects your device to the network that's least busy. This way, your router can handle the most demanding tasks in a house with multiple people. Game online, stream 4K movies, and make video calls, all at the same time and without glitches.