|LEGO® → System → Mindstorms NXT|
F9847 Bluetooth Dongle is a Mindstorms NXT set. It comes free with 8527 Mindstorms NXT when bought at shop.lego.com and official LEGO catalogs. It is otherwise completely the same as 9847 NXT Bluetooth Dongle. It allows a computer to control or program a Mindstorms NXT without a USB cable.