Etekcity USB WiFi Dongle & Wireless Network Adapter w/ Dual 6dBi Antenna for Laptop and Desktop Computer (802.11 b/g/n, 2.4GHz 300Mbps) (Certified Refurbished) This Certified Refurbished product is tested & certified by Etekcity to look and work like-new. The product includes all original accessories, and is backed by a 90-day warranty Easy connection - Plug-and-play installation on Windows 7 & 8 Fast transmission - Up to 300 Mbps transmission rate More stability - Dual antennas for maximum performance Universally Compatible - Compatible with Windows, and Linux