mini keyboard controller

Common key counts among mini controllers include 6, 25, 37, and 49 keys.

Most use synth-action or slim‑key velocity‑sensitive keybeds. Some models add aftertouch (occasionally polyphonic aftertouch). For additional expression they often include touch strips, pitch/mod wheels, and responsive pads.

They typically include USB‑C MIDI and bus‑powered/class‑compliant USB for computer connection, plus traditional 5‑pin MIDI DIN In/Out. Some models also provide 3.5 mm Sync I/O and CV/Gate outputs for modular gear.

Portability varies: some ultracompact units measure about 1.4 × 7.1 × 9.0 inches and weigh roughly 1.1 lb, while larger compact models can be several inches wider and weigh around 7.1 lb.

They commonly include a dedicated sustain pedal input (often a standard 1/4" TS jack). A few models offer a combined jack that accepts either sustain or expression pedals.