HIGH SPEED DUAL BAND WIFI: This usb wifi adapter's maximum speed up to 5GHz 433Mbps or 2.4GHz 150Mbps. Ideal for gaming online and seamless HD video streaming. Ultra-fast AC600 wireless adapter speed with 802.11ac. HIGH GAIN LONG RANGE ANTENNA: It can help you connect even when signals are weak,The internal omni-directional antenna for increased coverage and stability, easy to carry and no space occupation with mini size. WORKS WITH ANY WIFI ROUTERS: By using this wireless network adapter, you can upgrade your Desktop, Laptop, PC to work with the latest dual band router for faster speed and extended range. WIDE COMPATIBILITY: This mini wireless wifi usb adapter with standard USB 2.0 wireless wifi interface is compatible with Windows XP, Windows Vista, Windows 10, Windows 8, Windows 7, Mac OS 10.6-10.13. Works with any Wi-Fi routers, securely support WPA/WPA2/WEP/802.1X/WMM. Before using ,please also note this below: 1. Support Systems: Win10/8/8.1/7/Vista/XP/2000, Mac OS X 10.6-10.13 ,Not support Linux, TV,Projector,Printer 2. Standard: IEEE 802.11 b/g/n 2.4GHz, IEEE 802.11 a/n/ac 5.0GHz ,Built -in Antenna,USB 2.0 3. 600Mbps Wifi adapter's max speed is up to 433Mbps when you connect to 5G band,While it tops out at 150Mbps in 2.4G.Normally,your PC's network speed can't up to the wifi adapter's speed as it depends on many factors,Such as your network size,router,barriers,laptop or PC 's internal memory. 4. This usb wifi adapter only can receive network signals, but can not strengthen it, If you want to get booster function, then you choose a wifi extender. 5. It is different for the program between our usb wifi adapter with notebook's built-in netword card,The ablity to receive wifi for notebook with built-in network card is no stronger than mobile phone, While external network card is not better than notebook.The same router,From the ablity to receive wifi,the speed of the phone will be faster than computer. 6. If the wifi adapter stop working suddenly, Please unplug and replug the wifi adapter and then reinstall the driver or update the driver manually. 7. If the connection is unstable, please check your signal strength and signal channel. 8. If you meet a problem about the driver can not be installed on Mac 10.13.3 or Mac 10.13.4 system, please follw the suggestion steps to resolve the problem:1. Find out"system preferences 2. Click: Security and privacy 3. Then click"allow".