In a quest for the best waterproof Bluetooth speaker, I have bought, and given away, 20 or so units - some good - some not so good. But this is, by far, the best one I have ever seen - my quest is over! What an exceptional unit. Equipped with all the features you would expect - well designed, easy to operate, great battery life - the fidelity and volume separate this unit from the rest. This unit packs a ramped up volume you just cannot believe, without little or no distortion. I have a mild hearing problem and I like my music loud. (Probably why I have a hearing problem!) But even I cannot deal with this unit at full volume. It is amazing. Look no further.
O.K. It's got 24 watts of power, that's twice the regular model; but that's misleading (as far as sound pressure level). You see the extra wattage is for the 'BASS BOOST". You need more power to have a "Loudness" button. The Bass will, & does sound better, but it's only marginally louder than their original speaker. However, for $20 extra, it's worth it. you get: 100 Ft. of blue-tooth range as opposed to 66 Ft. Extended Bass, good for low volume listening; you can always turn it off at higher volumes in order to get a louder sound. It would have been cool if they gave you adjustable Bass,Mid-Range, & treble controls; but oh well. VERDICT = AWESOME SPEAKER, & IT'S WATERPROOF!