The Behringer B-Control Nano BCN44 is a super-compact universal MIDI controller whose miniscule size doesn't stop it from being a formidable contender for both studio and pure controller applications. You get 4 freely assignable push encoders with status LEDs, 4 freely assignable buttons with dual functions. Assignment of the panel elements is done either manually or via learn mode. The BCN44 can be easily connected to any computer/expander and similar equipment using the standard MIDI In/Out connectors. 99 user-programmable presets will help unleash your full creativity. For the ultimate in ease of operation and mobility, the BCN44 can run either on batteries (three standard AA 1.5-volt) or a power adapter.