This versatile harmonium is ultra-portable! It has beautiful tones and a side-fold bellows. The keyboard is an 2-1/2 octaves, which is sufficient for most players. It has four knobs: two to control air flow through the playing reeds, and two extra drone notes. The harmonium folds down to 7 x 11 x 18.5 inches when collapsed, and weighs only 15 lbs! It includes a well-designed black nylon carrying bag.