Mengo AquaCube, Waterproof Speaker

Super compact, clear, powerful sound (3W speaker), weighing only 2.4 ounces and featuring Bluetooth 4.1 technology.
IPX-7 water-resistance allows it to be submerged in water up to 3 feet, for no longer than 10 minutes.
Use it by the pool, in the shower, on a boat, or even in the rain without any worries!
Ability to answer/hang-up/redial/refuse calls with the push of a button
Hassle free, 1 year warranty - no questions asked