This is a great sounding and very useful box...

keyboard review Grace Digital Extreme Waterproof Portable

After a summer of being on the river 2 or more times a week and wishing I had my ipod, I finally found this little gem now that summer is over. It's not extremely loud, and if you are going through rapids frequently, you might not hear it well. However for typical floating it's great, and puts out enough sound for the whole canoe, and certainly enough for the kayak. I let it play for about 6 hours on one set of batteries and it goes full strength the whole time. It's also great for beaching when you want to hang on the banks for a while and chill.

The only problem I had that is when I put in my ipod and a pack of batteries, I busted my ipod screen. That was my fault though since I wasn't careful about the ipod placement. Make sure you put your ipod in the little netting (and don't put anything between your ipod and the speaker) inside or risk ending up with a busted screen. It was okay b/c the day before I had ordered a new ipod. Anyway, I highly suggest this water-resistant speaker!