The Boss BT-Dual Bluetooth® Audio MIDI Adapter (BT-DUAL) enables the connection of BOSS-compatible products with Bluetooth. Compatible with the BOSS Cube Street II Portable Instrument Amplifier. Once installed, you can pair with a Bluetooth device, such as a smartphone or tablet, and wirelessly communicate with the BOSS product. 

The actual wireless functionality available depends on the specific product model, but may include streaming music with Bluetooth audio, controlling various product functions with Bluetooth MIDI, and more.