The sound of the Boundary Bamboo Bluetooth Speaker is as natural as the Bamboo it’s derived from. It features a built in 2000mAh rechargeable lithium battery that delivers up to 8 hours of playback time at max volume! With a 3 watt speaker output and built in music controls/microphone the Boundary Bamboo Bluetooth Speaker makes the perfect desktop speaker for someone looking for something outside of the box. Included with the Boundary Bamboo Speaker is a retail inspired gift box that gives you a “Preview” of what’s inside and a Micro USB charging cable. Bluetooth working range is 10 meters (33 feet). Charge Time: Up to 5 hours. Bluetooth Version 5.0.