EXCALIBUR 145 SoundMaster Satellite Floating Wireless Speakers with Universal Dock for iPod. Create a sensation at your next pool party with Wireless Floating Speaker RF. A fusion of technology and portability, the Wireless Floating Speaker RF is a big sounding but deceptively small Made for iPod speaker system. Place the transmitter away from the pool, keeping your iPod safe and dry. The separate, water-resistant floating speaker gives you a great sound as it drifts in your pool or hot tub. You can add multiple speakers. Built-in 915 MHz wireless transmitter.