The keyboard is a full 3-1/2 octaves. It has two sets of reeds,
bass and male, and a coupler which allows two keys
(an octave apart) to play at once by pressing one key. There are 6 knobs, three for controlling the air flow through the playing reeds, and three for extra drone notes.
The bellows is 5-fold. The harmonium is easily portable when folded, being 7.5 x 12 x 23 inches when collapsed. It weighs 20.5 lbs. and comes with a well designed black nylon carrying bag.