TOMOTOP 300Mbps Wireless USB WiFi Adapter With External Antenna Wireless Data Rates: Up to 150Mbps Frequency Band: 2.4 GHz Standards: IEEE 802.11a/b/g/n Antenna: External Antenna Color: Black Features: Backward compatible with 802.11a/b/g/n standards Supports Windows XP/Vista/7/8/8.1, Linux and Mac OS x 10.5-10.8 3dBi Detachable Omini8 Directional Antenna Ultra compact, High-speed Class: N150 (3dBi Antennas)