Here's what makes it nifty: It can be fully immersed for up to 1-meter for about 30 minutes underwater. It's also dust-proof, waterproof, shockproof, rainproof, *and* snow-proof. It has a built-in rechargeable battery that can hold up to 12 hours of playtime and charges fully in three hours.
Promising review: "Of all the Bluetooth speakers I've tried in the past, this one has probably surprised me the most. It's not very large (perhaps only slightly larger than the palm of your hand), yet can get quite loud without compromising the sound quality. Basic speaker sounds (i.e when you turn it on, off, or if the battery is low) aren't too loud or annoying like the great majority of Bluetooth speakers I've owned. Battery life is about as advertised, however charging time takes a couple hours which can be irritating. One subtle but effective design quality I liked is that the logo isn't made too prominent, which is nice bc they look like your typical speakers without the annoying badge/logo everywhere. Would recommend, but take a second look at the dimensions before buying bc they are quite small." —Christina
Get it from Amazon for $20.99+ (available in six colors).