Rosewill RNX-N250PCEv2 PCI-E Wi-Fi Adapter is a wireless adapter that allows you to connect your computer to a wireless network. It is compatible with Windows XP, Vista, 7, 8, and 10. The adapter supports 802.11b/g/n standards and provides speeds up to 300Mbps. It also has two external antennas for better signal reception. You can use the adapter to connect to the internet, share files, play games, and more.