Decided to move from 2.4ghz to 5ghz on my computer because since having the NBN, the supplied router supports 5ghz and I was not getting the full speed of the internet from 2.4ghz WiFi. You can pickup from in store to save on postage.
Simplecom NW602 AC600 Dual Band Nano USB WiFi Wireless Adapter NW602
MPN: NW602 SKU: 8460651001991
Upgrades PC or Mac to the latest 802.11ac Wi-Fi technology with 5GHz support
Dual Band wifi supports up to 433Mbps on 5GHz and 200Mbps on 2.4GHz
Ultra Compact Nano Form Factor, ideal for laptops
USB 2.0 Interface, Wave-2 compatible with MU-MIMO
Easy to install and configure with the setup CD and Utility
Supports Windows XP and above (32/64-bit), Mac OSX
I know the link from OP is a dual band receiver but I grabbed one of these 2.4GHz units from this post back in December.
Works nicely, cannot complain for the price (AU$2.70 delivered).