This Portable Harmonium is a well-crafted instrument for all levels of experience. The full-size keyboard is 3-1/2 octaves, offering a full range of voicing. It is made of natural teakwood that gives the sound a vibrant but mellow quality that improves over time. It has two sets of reeds, bass and male, and multi-fold foil bellows. It has 9 knobs: four to control air flow through the playing reeds, and five extra drone notes. The harmonium folds down to 6 x 15 x 23 inches when collapsed, and weighs 25 lbs. It includes a black nylon carrying bag.