42 Keys Stable Sound Quality Handcrafted Solid wood construction Unmatched sustain, tuning, and dynamic range Harmonium is a type of free-reed organ that generates sound as air flows past a vibrating piece of thin metal in a frame. The piece of metal is called a reed. Best choice investment for those who appreciate musical instruments that start off awesome. This instrument produces dynamic and versatile sound which is treat to ears. Brand No Brand SKU OT776EL19JUQ0NAFAMZ-129924