Ultimate Ears has added the new waterproof Wonderboom speaker ($100) to its lineup. The round speaker provides 360-degree sound and can be immersed in water up to one meter for up to 30 minutes, so it can withstand the rigors of a sudden rain storm or outdoor pool party. It also floats, has a hanging loop (to make it easier to fish out of a pool if it’s knocked in) and is drop-proof to five feet. The company claims the speaker can last up to…