The Boundary Natural Bamboo Bluetooth Speaker contains a 2000mAh rechargeable lithium battery. It has a 3W speaker output and built-in music controls with a microphone for hands-free operation. This FSC Certified bamboo speaker comes in a retail-inspired gift box and includes a Micro USB charging cable. It charges in 5 hours using the included cable and provides up to 8 hours of playback at maximum volume when fully charged.