Every 802.11ac router offers at least dual-band Wi-Fi, which means your devices will be able to connect either on the 5GHz or 2.4GHz frequencies to give you the best balance of range and performance. Tri-band Wi-Fi routers give you an additional 5GHz band to divvy up your high-speed devices across two channels. These powerful routers are a great option for busy homes with lots of wireless devices streaming and gaming at the same time, but since each device can only be connected to a single channel, there’s no point in spending the money on a tri-band router if you only have one or two users on your home network.