HiRO 802.11n Wireless USB Network Adaptor with High-Gain OMNI Direction 2dBi External Antenna, WPS Hotkey, Windows Vista / 7 Ready, RoHS. Protocol IEEE 802.11n Improvements: Significant increases in connection speed / Backward compatible to IEEE 802.11b and IEEE 802.11g / Download speed up to 150 Mbps. Petite Physical Dimension with USB Connector: Light in weight, small in size, and easy to carry around / Offer high compatibility and speed up to 480 Mbps / Backward compatible with USB 1.x standard. High-Gain OMNI Direction 2dBi Antenna: Long transmittance distance for continuous, stable connection / Ample length in connection wire allows the antenna to be freely location to avoid potential interference.