Blackstar's Bluetooth Tone:Link is the easy way to turn any amp with a line in, into a wireless stereo audio receiver. With it, you can listen to audio or jam along with tracks without the inconvenience of cables. It is designed for guitar amps, PAs, mixer desks, AV systems, home stereos, headphones, car or motorcycle speakers, boats and more. If used with phone it is an easy to use, hands-free Bluetooth speaker for vehicle systems.