US Robotics Wireless Ndx PCI Adapter. Connectivity technology: Wireless, Host interface: PCI. Data transfer rate (max): 270 Mbit/s. Frequency band: 2.400 - 2.4835 GHz. Antenna connector type: R-SMA, Gain: 2 dBi. Width: 133 mm, Depth: 121 mm, Height: 22 mm