TOMTOP 300Mbps Wireless USB WiFi Adapter With External Antenna 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. Provides USB 2.0/1.1 hight speed interface. Transmission rate up to 300Mbps. Supports Ad-Hoc, infrastructure WLAN network, wireless roaming. 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. It can be worked with laptops, notebooks and PC desktop computer as well.