This Teak Bengali Harmonium is a very well-crafted and portable instrument for bhajans and kirtan. The keyboard is 3-1/2 octaves, which is sufficient for most players. 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 24 inches when collapsed, and weighs 25 lbs. It includes a black nylon carrying bag.