Hi, I got this bluetooth speaker from someone and found out that it's waterproof so I did a test to see how it sounds in the water and if it's really waterproof. The speaker model is the Sony SRS-XB21 and I can say that it's as good as it sounds even outside. The battery is said to last about 12 hours max, but if you listen to the max volume I think it gets somewhere for up to 6 hours of use. There is also a party mode where the speaker can actually be been hit and it will take out different sounds of percussion or even some custom sounds. It's an exciting speaker and you can connect up to 100 speakers of this kind, I think this is a little crazy to connect 100 such speakers and make a party somewhere on the beach or in a pool. In this video, I basically tortured the speaker a little bit because I was curious if it really will resist underwater and if it does get broken. I'll let you see what this little audio speaker can do. Enjoy!
My video is at DLive