UD-BT01 wireless bluetooth midi adapter UD-BT01 wireless bluetooth midi adapter For Bluetooth connection (version 4.0 and above) between USB to host socket (keyboard, digital piano, etc.) and iPad, iPhone, Mac Supports operating systems: iOS 8 or higher, OSX Yosemite or higher Dimensions (L x H x D): 45 x 12 x 40 mm Weight: 10 g Colour: Black