Cosmos bamboo Bluetooth® speaker. A more sustainable choice! The Cosmos bamboo Bluetooth® speaker is sure to get anyone’s 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 an FM radio tuner, Micro SD Card input, and a USB input. In other words, music can be played from the radio, Micro SD Card, or a flash drive! Built-in music controls and a microphone for hands-free operation. Bluetooth Version 4.2 with a working range of 10 meters (33ft). Bamboo.