The Akai GX-F25 is a 25-key MIDI keyboard controller designed to be portable and compact for musicians on the go. It features velocity-sensitive keys, octave and transpose controls, and a sustain pedal input to allow for expressive performance. It also has multiple output options, including USB, MIDI DIN, and Apple's iPad Camera Connection Kit, making it compatible with a variety of computer and iOS devices. The Akai GX-F25 is a great choice for budget-conscious musicians who still demand a high-quality keyboard control surface.