There are only two types of wireless routers on the market now. The prevailing standard is 802.11n. These routers transmit on both 2.4 and 5 GHz frequencies, though most users find the 5 GHz band less crowded and more efficient. Using multiple antennas, these routers can transmit much more data than their predecessors.
You’ll also find 802.11ac routers on the market. These are significantly faster, but also more expensive. These routers use multiple antennas as well, and each one can support more than double the Mbps of an antenna in an 802.11n router. Nearly all equipment supports both standards, so you can choose the router with the capacity and price tag that best suit your needs.