The Cosmos bamboo Bluetooth speaker is sure to get attention. The speaker body is made from real bamboo and with a 3W output it produces a crystal clear sound that can be heard for approximately two hours at max volume. The speaker also features a Micro SD Card input and a USB input. Built-in music controls and a microphone for hands-free operation. Bluetooth Version 4.2 with a working range of 10 meters (33ft).