Cork Wireless Speaker - Cork Wireless Speaker - 5.3 ABS wireless speaker with cork casing, bamboo element on top and LED indicator light. 1 300 mAh lithium battery included. Output data: 3W, 4 Ohm and 5V. Playback time approx. 4 hours. Cork is a 100% natural material. Due to its structure and surface porosity, the final appearance of the print on each item may vary.