The Dorne Aluminum Bluetooth Speaker is sure to get anyone's attention! The Aluminum speaker body produces a crystal clear sound that can be heard for over two hours at max volume. With a 3W output the Bluetooth Speaker will be sure to fill out your office or room with crystal clear sound. The Bluetooth speaker also features a FM radio tuner, Micro SD Card input, and a USB input. So music can be played from the radio, Micro SD Card, or a Flash Drive! The speaker features built in music controls and a microphone for hands free operation. Bluetooth Version 4.2. Bluetooth working range is 33ft.