The Zoom Wireless-N USB adapter Model 4411 adds 802.11n/g/b Wi-Fi capability to Windows 7, Vista, XP, 2000 computers with an available USB port. A maximum uncompressed speed of 150 Mbps is supported. The Model 4411 works in all 802.11n, 802.11g, 802.11b and mixed networks. Wi-Fi Multimedia (WMM and WMM-PS) provide Quality of Service (QoS) features to prioritize traffic according to four Access Categories (AC) - voice, video, best effort, and background. Security is provided with WPA, WPA2 , WEP and 802.1X high-level WAN security. WPS (WiFi Protected Security) is supported for easy security setup. The Model 4411 is USB port powered and Restrictions of Hazardous Substances (RoHS) compliant.