The Aqua Sounder Floating Speaker can play MP3 music through wireless devices. This ball floats in water and works great with swimming pools. Grace Digital Audio created the Aqua Sounder Floating Speaker and placed a $149.99 MSRP on it. The speaker also has a pair of mood lights to make it easier to find it at night time. The transmitter works by plugging an audio source into it using a 3.5mm jack to the speaker. The range is about 150 feet from the transmitter. The battery inside the speaker lasts for a good six hours.