Starr Labs AirPower2 Wireless MIDI to USB Transmitter System Turn/upgrade any MIDI equipped controller instrument/device into a long distance wireless controller Wirelessly control anything with a MIDI in from up to 250 feet away: computer apps, sound modules, audio mixers, lighting consoles Excellent dropout protection and recovery for stage and mobile performance use All pictured accessories included Holster, 2 antennas, 2 foot USB cable, 9V Adaptor, mini screwdriver (for setting RF channel) USB buss and/or AA battery powered (batteries not included)