Buffalo Wireless-N Nfiniti PCI Adapter. Connectivity technology: Wireless, Host interface: PCI. Data transfer rate (max): 300 Mbit/s. Gain: 2 dBi. Compatibility: PC. Dimensions (WxDxH): 120 x 65 x 10 mm, Antenna type: RP-SMA x 3, Compatible operating systems: Windows 2000, XP