TOMTOP 300Mbps USB Wireless Adapter WiFi Network Lan Card 802.11n/g/b 300M Wireless WiFi USB 2.0 Adapter (Realtek 8191 Chipset). Complies with IEEE 802.11n(draft), IEEE 802.11g, IEEE 802.11b standards. Supports Windows 2000, XP 32/64-bit, Vista 32/64-bit, Linux, MAC OS x. With an external antenna. Simple configuration and easy to use.