Audio Unlimited PoolPOd Wireless Floating Waterproof Speaker Allow you to Enjoy your music while relaxing in a hot tub, Pool Or anyother Water environment. This Fully waterproof speakers powered by 900MHz Phase Loop Lock circuitry, which guarantees a strong, clear signal up to 150 Feet away, With no line of sight limitations. The transmeter delivers a powerful signals through walls or any other obstacles in your Yard