Eco speaker with no battery or power required; Incredibly rich sound with just internal reverberation. Volume and sound quality you want to get it and hear once Choose from Walnut, Blush, Mahogany or Maple Not only does it look but also the sound reverberation vary from wood to wood so you can enjoy your sleet. (*Because natural wood is used without wasting much effort, knots and other items may appear on the surface. We hope you enjoy it as a single personality. )