M-Audio Oxygen 25 MKV USB Key Controller.

• 25 full-size, velocity-sensitive keys
• Preset and DAW buttons for auto-mapped DAW controls & plugin parameters
• Smart Chord mode enables playing of enharmonic or custom chord voicings
• Smart Scale mode eliminates wrong notes making it easy to craft a perfect song
• Arpeggiator with Type, Octave, Gate and Swing controls
• 2 banks of 8 velocity-sensitive trigger pads with Note Repeat for beat production
• (8) assignable knobs for manipulating virtual instruments and plugins
• Assignable fader lets you mix your productions with ease
• Transport buttons let you control your DAW without reaching for the mouse
• Display provides instant parameter feedback
• Ergonomically designed pitch and modulation wheels & 1/4” sustain pedal input
• Includes MIDI editor software and a complete software production package