Yamaha MDBT01 Wireless Bluetooth MIDI AdapterThe MD BT01 from Yamaha provides the wireless user with a wide range of performance and composing music applications by connecting iOS devices and Mac computers with instruments that use the older 5 pin DIN MIDI connections. A wireless MIDI connection means not having to worry about plugging anything into an iOS device, and the devices themselves (iPhone iPad iPod touch) can also be charged while using apps without worrying about the battery running