Kindly Note: Please install the driver first, then insert the USB Wi-Fi adapter. How to install the Wi-Fi adapter 1. Insert CD into PC (don\'t plug the Wi-Fi adapter first) 2. Open the \"setup. exe\" in CD, and install the driver. 3. Insert the Wi-Fi adapter 4. If you have any questions or problem when using, please feel free to contact us. you can contact us by message we will immediately to solve the problem for you within 24 hours. Sincerely at Your Service. Dual band AC600Mbps wireless Wi-Fi adapter - With AC600 wireless Wi-Fi adapter, you can shift between 2. 4GHz and 5GHz Wi-Fi bands to avoid interference and have optimal Wi-Fi internet connection for your PC, laptop or Mac. - You can use the more clear 5GHz Wi-Fi band for on-line streaming of HD video, gaming, music, photo; and use 2. 4GHz band for web surfing, online chatting. - 2dBi detachable Omni-directional antenna provides high performance and increased coverage for your wireless network. Specifications: - Standard: IEEE802. 11a/b/g/n & 802. 11ac - Frequency Range: 2. 412GHz - 2. 4835GHz, 5. 15 GHz - 5. 825 GHz - Antenna: External, Detachable, 2dBi - Interface: USB 2. 0 - Security Encryption: WPS, 64/128bit WEP, WPA/WPA2, WPA-PSK/WPA2-PSK(TKIP/AES) - Support System: Windows 2000/XP/Vista/7/8. 1/10(32-bit/64-bit) / Mac OS X 10. 4-10. 11v - Comes in a high pressure plastic packaging that doesn\'t break apart. Package Includes: 1 Wi-Fi Adapter 1 Detachable Antenna 1 CD Driver 1 User Manual