TP-LINK N900 Wireless Dual Band PCI Express Adapter 2.4GHz or 5GHz up to 450Mbps TL-WDN4800 (Certified Refurbished) This Certified Refurbished product is factory refurbished, shows limited or no wear, and includes all original accessories plus a 90 day factory warranty. Allows desktop computers to connect to high-speed wireless networks, Reaches blazing speeds of up to 450Mbps at 2.4GHz or 5.0GHz Quick, easy installation with bundled CD utility, Three antennas for increased wireless performance and stability Supports dual band 2.4GHz and 5GHz channels for smoother HD video streaming, online gaming, and file sharing Seamless compatibility with 802.11a/b/g/n products, Supports Windows XP 32/64bit, Vista 32/64bit, Windows 7 32/64bit, Windows 8 32/64bit and Windows 10 32/64 bit