OMNITRONIC KEY-25 is a USB MIDI keyboard controller designed for music production, DJ sets, and mobile use with PC and Mac computers. It features 25 velocity-sensitive mini keyboard keys, an arpeggiator, octave and transpose controls, pitch modulation, and plug-and-play operation. The compact unit connects via mini USB and works with virtually any audio software. Dimensions are 34.6 × 9.7 × 5.3 cm and weight is 0.47 kg.