Akodi via Amazon offers the Anewkodi Dual-Band 802.11n Wireless USB Adapter for $18.99. Coupon code "IRRWVGOT" cuts it to $9.99. Plus, Prime members bag free shipping. That's a buck under our March mention and $2 under the lowest price we could find elsewhere. It features a long-range 2dBi antenna and up to 600Mb/s WiFi speeds on 5GHz and 2.4GHz bands.