The M-Audio Oxygen 25 Mini (likely referring to the new Oxygen 25 MKV) has 25 full-size velocity-sensitive keys, 8 velocity-sensitive drum pads, 8 assignable rotary encoders, 1 fader, transport controls, and a pitch-bend/modulation wheel. It is powered via USB, includes a Sustain input, and has features like an arpeggiator, note repeat, and automatic DAW mapping for compatibility with major software.
Pads: 8 backlit, velocity-sensitive pads
Controllers:
8 assignable rotary encoders
1 assignable fader
1 pitch-bend wheel
1 modulation wheel
Transport controls (play, stop, record, loop)
Performance features: Arpeggiator, note repeat, octave shift
Connectivity: USB-B for power and MIDI, 1/4" sustain input
Compatibility: Automatic mapping with major DAWs
Power: USB bus-powered
Software: Comes with MPC Beats and Ableton Live Lite