Wireless N150 is a subset of the 802.11n Wi-Fi standard. It incorporates most of the improvements introduced by previous versions, but omits the channel-bonding feature. This limits it to a maximum theoretical data rate of 150Mbps, rather than the 300Mbps available to dual-channel equipment.
If you would like to read more about 802.11 standards, check out our IEEE 802.11 Wi-Fi standards blog in our News section.