UB400 Bluetooth 4.0 Nano USB Adapter UB400 is highly portable and much smaller than a flash drive. Plug and play in Win8/8.1/10 systems to enjoy a wireless communication with Bluetooth-enabled devices. UB400 supports advanced Bluetooth 4.0 and enables wireless connectivity with a wide range of devices such as computers, printers, phones, headsets, speakers, keyboards, controllers, etc.