The Highs: The SoundWave hooks to a computer through a USB connection, which also recharges the battery. Transferring songs is easy using Microsoft Windows Media Player; iTunes users (Windows or Mac) must first convert files to the MPEG/MP3 format, which adds a few steps. We took the SoundWave from a hot tub to a waterbike to a wakeboard. In each case it worked as promised, with an elastic armband to hold the player in place and waterproof clip-on ear buds. Volume range was sufficient, whether listening to digital music or radio. We threw it in the water, and yes, it floats.