[Loud Stereo Sound & Powerful Bass] Deliver surprisingly loud and well-balanced sound with virtually no distortion through 2 drivers by our proprietary technology. Enjoy up to 10W Louder Volume, Crystal Clear Stereo Sound, Active Extra Bass by the two Passive Radiators. [Waterproof on Both Bluetooth Speaker and Fanny Pack ] It was designed with waterproof feature on both the Bluetooth Speaker and the Waist Pack to meet your vairous circumstances request,No matter you are sweating profusely after a long time running or need to pour a bottle of cold water over the head,just to do it without hesitation,the inside things will be safe without be moisture and the music is still going on.