Samson Graphite M25 USB MIDI Controller gives you all the music production control you need for home studio and mobile applications. Packed into an ultraportable design the Graphite M25 features a 25-key velocity-sensitive mini keyboard trigger pads with aftertouch a full-featured control surface and additional programmable functions for advanced playability and customization. And with iPad/USB bus power and plug-and-play operation the Graphite M25 makes it easy to express your most dynamic musical ideas no matter where creativity strikes.