Waterproof & rugged? Check. Good sound? Check. Bluetooth? Check. The Wonderboom is the newest member in the UE family, delivering solid sound and packing an IPX7 waterproof rating (capable of being immersed up to 1 meter for 30 minutes). The Wonderboom looks like the perfect sub-$100 speaker to take to the beach, the pool or lake. Reviews are in, and they're very positive.