Powered by H2O Audio, this case will protect your iPod Shuffle while swimming Designed for the 4th generation iPod Shuffle 100% waterproof up to 12 feet of depth Convenient controls for playback and volume control Includes case and bass-amplified Surge 2G headphones Powered by H20's waterproofing technology, the Interval 4G is a waterproof case with integrated headphones designed for 4th generation (the current generation) iPod Shuffle. The Interval 4G is the only waterproof iPod case designed just for swimmers. It's IPX rating is IP8, making it subersible up to 12ft/3.6m underwater. Integrated goggle loops make it easy to attach and remove the case from almost any swim goggle. Short headphone wires make it convenient to contain your personal soundsystem entirely on your head keeping your arms free of wires. Easy to use, the Interval's push buttons align with the iPod button controls for playback and volume control in the water or out. Integrated into the case is a pair of bass amplified Surge 2G headphones.