Arturia KeyLab Essential 61

61-note MIDI Controller Keyboard with Extensive Hands-on Controls, 8 Performance Pads, MIDI/USB Connectivity, Analog Lab Virtual Instrument, and Other Software Specs : Type: Keyboard Controller Number of Keys: 61 Type of Keys: Synth action Velocity Sensitive: Yes Pads: 8 x back-lit performance pads Other Controllers: Pitchbend, Mod Wheel Encoders/Pots: 9 x encoders Faders: 9 x 30mm faders Dedicated Transport Control: Yes Pedal Inputs: 1 x 1/4" (sustain) MIDI I/O: Out/USB USB: 1 x Type B Software: Analog Lab, Ableton Live Lite, UVI Grand Piano Model D Format: AAX, AU, VST3, VST, Standalone Hardware Requirements - Mac: Multi-core 2GHz processor or higher, 4GB RAM minimum Hardware Requirements - PC: Multi-core 2GHz processor or higher, 4GB RAM minimum OS Requirements - Mac: OS X 10.8 or later, iOS OS Requirements - PC: Windows 7 SP1 or later, Android Power Supply: 9V DC power supply (sold separately) / USB bus powered (MIDI out requires 9V adapter) Height: 2.9" Width: 34.7" Depth: 9.7" Weight: 7.2 lbs.