Just Plug it into Desktop or Laptop PC USB Port, it will automatically detect and install the driver for the system. No need to download driver, or read the driver disc with the optical drive, especially convenient for the ultrabooks without optical driver. *Connects laptops and PCs to Wireless N networks via USB, Speeds up to 300Mbps for lag-free video streaming and Internet calls, Miniature, plug-and-forget design *Soft AP Mode create a Wi-Fi hotspot for mobile devices in condition that there is only wired internet connection. *Supports Windows XP/Vista/7/8/8.1/Linux(kernel 2.6.18-3.19.3)/Mac OS X 10.7-10.11, Compatible with 802.11b/g/n products *Quick setup with included CD, WPA/WPA2 encryption for advanced security *Easy to install, Lifetime warranty, Driver updates, Full technical support in English