US Robotics 54 Mbps Wireless PCI Adapter. Connectivity technology: Wireless, Host interface: PCI. Data transfer rate (max): 54 Mbit/s, Supported data transfer rates: 1 - 54 Mbps. Antenna connector type: R-SMA, Gain: 2 dBi. Width: 121 mm, Depth: 22 mm, Height: 133 mm. Certification: CE, RoHS