As I waited anxiously this week for 8bitdo's retro receiver to arrive, I looked over at my old wireless solution for the NES; The Acclaim Wireless Nes Infrared Controller. The old controller still works decades later, but is hampered down by its infrared technology. The range is limited to a few feet, and even worse, line of sight between the controller and its huge sensor is a must for it to work at all.
8bitdo has answered the call with its Retro Receiver adapter. This modern take on wireless uses modern bluetooth technology. The adapter itself is about the size of the average adult thumb, and powered directly from the NES port itself. No controllers come with the $20 adapter, but it does work with all of 8bitdo's controllers and joysticks in addition to the Wiimote, Wii U pro controller, PS3, & PS4 controllers. The contents of the box are sparse, and only contain the adapter, a usb cable for connecting to your PC/Mac, and what can loosely be called "instructions".