1. Driver free: The adapter is built-in driver software, insert the network card, the driver will install automatically and enable your pc to connect to the Wi-Fi. If your computer have no access to the internet or isn't able to read a CD driver, this would be a perfect choice.2. 2 in 1 Wi-Fi and Bluetooth: Double Antennas to gain strong signal. Wi-Fi: Works with Windows, just plug and play. Vista/Mac OS,need install the driver, install the driver via a mini CD (included). Bluetooth: Only for windows 7/8/8.1/10, not compatible with Vista/xp/Mac OS.(The blue LED light will flash when works.) 3. 2.4ghz/5.8ghz dual band Wi-Fi Built-in Chip RTL8821CU, lasted IEEE802.11 a/b/g/n/ac universal wireless network technology.