Roland A-500PRO-R 49-key MIDI Keyboard Controller, Black

Roland A-500 PRO 49-key MIDI Controller Features at a Glance:
49-key MIDI controller with velocity-sensitive keys
45 assignable controls: knobs, sliders, buttons, transport, and more
8 dynamic pads for finger drumming and MIDI triggering
Sure-grip Pitch Bend/Modulation stick
Sustain and Expression pedal jacks to expand playability
USB bus powered – no AC adapter required
Both Mac and PC compatible
Load up with a feature-packed MIDI controller and start making music!
Tech Specs
Number of Keys: 49
Type of Keys: Semi-weighted
Aftertouch: Yes
Pads: 8
Other Controllers: Pitch, Mod Lever
Encoders/Pots: 9
Faders: 9
Dedicated Transport Control: Yes
Pedal Inputs: 1 x Hold, 1 x Expression
MIDI I/O: In/Out/USB
USB: 1 x Type B
Hardware Requirements – Mac: Intel Processor, PowerPC G4 1GHz or Faster, 512MB RAM or Faster, 100MB or More Free Space
OS Requirements – Mac: OS X 10.8.5 or later
OS Requirements – PC: Windows 7 SP1 or later
Power Supply: Bus Powered, AC Adapter
Height: 3.63"
Width: 33.06"
Depth: 9.88"