Trendnet'S Ac1900 High Power Dual Band Wireless Usb Adapter, Model Tew-809Ub, Upgrades A Computer To Wireless Ac1900. Quickly Connect To A High Performance Wireless Ac Network At 1300 Mbps Or To A Wireless N Network At 600 Mbps. A High Power Radio With Detachable High Gain Antennas Increase Wireless Coverage.