D-Link DWA-137 N300 High-Gain Wi-Fi USB Adapter

"N300 High-Gain Wi-Fi USB Adapter - Wireless N300 technology give you increased speed and range over 802/11g/b/n - Wireless speeds of up to 300 Mbps - Detachable high-gain omni-directional 5dBi antenna with integrated omni-directional 2db"