LB1 High Performance 600Mbps Dual Band USB Wifi Wireless-N LAN Network Adapter for Dell OptiPlex 990 SFF - Mini Size Ultra Fast (5GHz 433Mbps, 2.4 GHz 150Mbps) Supports 802.11 N and Backward Compatible w/ 802.11 a/b/g/n Products GET WiFi ACCESS WITHOUT THE EXPENSE Adapter makes it possible to get online without having to change your hardware SO EASY TO INSTALL Setup CD included is easy to run; Once everything is installed, you can get online just by slipping in the adapter MINI SIZE SOLUTION Doesn't stick out far from your laptop or desktop's USB port, so you can leave it in place SURF THE WEB AT TOP SPEEDS Transfers data at an incredibly fast AC600 (433+150Mbps) wireless speed SATISFACTION GUARANTEED If you're not 100% pleased with your purchase within 60 days, we'll refund your money!