With a lightweight plastic design and internal rechargeable battery, the Cylinder Bluetooth Speaker provides up to 1.5 hours of playback time when fully charged. It charges in just one hour using the included Micro USB cable. The speaker features a built-in microphone for conference calls, has a powerful 3W output, and has a Bluetooth working range of 33 feet (10 meters). Material: ABS plastic. Internal rechargeable battery. Charge Time: 1 hour. Playback Time: Up to 1.5 hours at maximum volume. Includes 1 Micro USB charging cable. Bluetooth working range of 33' (10m). 3W speaker output.