The Sylphyo Link Receptor turns your Sylphyo into a wireless instrument, allowing you to connect it to an amplifier, mixer, or any sound system while moving freely around the stage, home, or rehearsal space without being bothered by cables. It also turns your Sylphyo into a wireless MIDI controller for your computer, smartphone, or tablet, as well as for your virtual instruments or hardware synthesizers.

Link is also very useful on its own. You can use it as a USB MIDI router to connect MIDI devices to your computer, or use it as a synthesizer and play its sounds using another MIDI controller or USB-MIDI device.