Pool Party Speakers
Plenty of companies make outdoor speakers or waterproof speakers that can go near your pool. What about speakers that go in the pool? Don't have a pool? Replace your rubber duckie in the tub with these too.
These speakers are wireless, obviously, and they come with a transmitter that plugs into the headphone jack of your portable audio player. It will transmit the signal up to 150 feet away, so you can keep your iPod nice and dry while the splash-dance party begins.