The Bluetooth� Audio MIDI Dual Adaptor (BT-DUAL) is a compact adaptor that brings Bluetooth audio and MIDI capabilities to compatible BOSS and Roland products. Once installed, you can pair with a Bluetooth device such as smartphone or tablet and communicate wirelessly with the product. The actual wireless functionality that�s available depends on the specific product model, but it may include music streaming with Bluetooth audio, controlling various product functions with Bluetooth MIDI, and more.