Acorn Instruments Masterkey 49 USB MIDI Controller Keyboard 49-key keyboard controller for use with virtually all music software and MIDI devices Velocity sensitive keys for expressive, musical performance USB MIDI for use with Mac and PC. Pitch and Modulation wheels for capturing musical expression, 4 pots and 1 fader for tweaking parameters. 6ft USB cable, Manual/User Guide, DVD containing Presonus Studio OneTM Artist and content material