Source Audio Hot Hand USB, Wireless Midi Controller, 3 axis motion sensor ring & USB receiver, Driverless USB MIDI operation for Windows/Mac, Rechargeable Lithium-ion battery for 6 hour usage time, Capable of transmitting over 100 feet, Works with any MIDI compatible audio software (Ableton, Reason, Logic, Traktor, etc), includes: Ring (sender), USB stick (receiver) and power supply