The NES Hub is a new accessory for Nintendo's classic NES console. While the 15-pin expansion port never had any official uses in the NES, the NES Hub adds Bluetooth controller support, among other uses.https://www.notebookcheck.net/NES-Hub-announced-for-Nintendo-NES-expansion-port-with-Bluetooth-controller-support.815049.0.html
Will definitely be purchasing this