Akodi via Amazon offers Prime members the Anewkodi 802.11ac Dual Band Wireless USB Adapter for $16.89. Coupon code "IGTZQ7UP" cuts it to $11.49. Plus, Prime members bag free shipping. (Non-members can spend $49 or more to qualify for free shipping; otherwise, shipping costs $8.06.) That's $2 under the lowest price we could find for a similar adapter elsewhere, although we saw it for a buck less last week. It features a long-range 2dBi antenna and up to 600Mb/s WiFi speeds on 5GHz and 2.4GHz bands.