**--- Portable and Powerful ---** Greenwood Bluetooth Sustainable WALNUT WOOD MiniSpeaker Made from a Sustainably Harvested Walnut Tree 30 ft Bluetooth range, Big Sound from a speaker that is ultra-small and portable 6 hours of constant playback with a built-in Rechargeable Lithium-ion Battery Each Speaker has a unique One-Of-A-Kind- Wood Grain and Look Line in port and cable for use with non-Bluetooth devices