The Tech 21 MIDI Mouse is a compact MIDI foot controller designed for easy access to 128 patches across 16 MIDI channels. It features Up/Down switches for seamless navigation, a robust aluminum construction, and a clear LED display for visibility under any lighting conditions. The device can be powered by a 9V battery, phantom power via MIDI cable, or an optional DC adapter. It measures 12 x 9.5 x 5 cm and weighs 312 grams.