WarmTips:1.The driver must be installed first, then plug the wifi adapter into your PC.2.When using wifi adapter for your laptop,please turn off the built-in Wi-Fi if your laptop has built-in Wi-Fi. 3.The PC back USB port?s compatibility and connection stability are better thanthe front USB port. So we suggest you insert it on back USB port of your PC. 4.You can get extended Wi-Fi speed of 867Mbps ( Max connection speed ) on 5GHzWiFi band or 400Mbps(Max connection speed) on 2.4GHz WiFi band 5. If you have any doubt,Please contact us viaAmazon message, we offer life-time Technical Support. Network Adapter Specification:1) Chip:8812BU2) USB 3.0 port3) Max Transmit Speed: 5.8GHz/867Mbps or2.4GHz/400Mbps4?Supported OS: Windows XP / 10 / 8 / 8.1 / 7/ Vista Mac OS 10.6-10.155?Wireless Standards?IEEE 802.11ac,IEEE 802.11a,IEEE 802.11n, IEEE802.11g, IEEE 802.11b6?Wireless Security: WPA/WPA2/WPA-WPA2/802.1x and64/128 bit WEP and WPS (PIN, PBC)7?Detect the network and change transmit speed automatically8) Support WPS 2.09?Internal Omni-directional Antenna10?Support 2.4G and 5.8G dual band11?Support Wi-Fi Direct12?Saving energyPackage Includes1 * USB 3.0 Wi-Fi Adapter1 * USB flash disk ( Include Driver )1 *USB extension cable1 * User Manual