The bluetooth speaker features a rechargeable 8000mAh battery that provides up to 8 hours of playback time at max volume. The speaker can also be used to charge your mobile device with the built in USB Output or with the built in wireless charging powerbank. Your phone must be compatible with wireless charging. Two devices can be charged at the same time while you enjoy your favourite music. Once your journeys over this Bluetooth speaker makes a great desktop speaker with built in music controls and a microphone for hands free calling. With stereo sound (2 x 3 Watt) the speaker will be heard around the camp site or conference table. Bluetooth version 5.0. Charging Time: Up to 6hrs. Bluetooth working range is 10 meters (33 feet). Micro USB charging cable provided.