Interval 4G Waterproof Headphone System

Powered by H2O Audio technology, the X-1 Interval 4G Waterproof Headphone System features a waterproof case with integrated headphones designed for the 4th-generation (the current generation) iPod shuffle. (iPod shuffle sold separately.) The Interval is the only waterproof iPod case designed just for swimmers--finally swimmers can have the same advantage of training with music that dry land athletes have enjoyed for years.

Developed for swimmers, the Interval is easy to use and doesn't get in the way. View larger

Push buttons align with the iPod controls for playback and volume controls. View larger
(iPod Shuffle not included)

Developed for Swimmers

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.

Convenient Controls

Easy to use, the Interval features push buttons that align with the iPod button controls for playback and volume control in the water or out.

Personalized Fit

Each package includes 5 sets of Elastomer earplugs (XS-XL) to ensure a waterproof seal and comfortable fit while swimming, running, and working out.

100% waterproof design withstands submersion to 12 feet

100% Waterproof

X-1's patented waterproof technology allows the case and headphones to withstand heavy perspiration, and submersion to 12 feet (3.6m) underwater for an unlimited amount of time. Because they're waterproof, they simply rinse clean as needed.

Hydrodynamic Design

The headphone's ergonomic sheared shape sits flush with the ear and is designed to promote proper alignment of the earbud with the ear canal for superior sound and less drag, in or out of the water.

Improved Bass Amplified Sound

The latest waterproof technology delivers improved bass quality, while sound-isolating, watertight earplugs provide warm sound and dynamic bass response powered by waterproof 8mm neodymium drivers.

About X-1 Audio

Inspired by the Bell X-1, the first aircraft to break the sound barrier, the team at X-1 set out to perfect a line of products that break down the barriers of sound, allowing athletes to harness the power of music regardless of sport or climate. Whether you're a triathlete, swimmer, runner, kayaker, snowboarder, climber, weightlifter, or a gym goer, X-1 offers audio solutions that can withstand everything from trekking through the mud to running in the rain to diving 12 feet underwater. Since it's proven that music can significantly reduce the perception of effort and increase endurance during physical activity, X-1 empowers athletes to train and perform at their peak with music, regardless of sport and whatever Mother Nature throws at them.

Choose the X-1 Headphone That's Right for You

	Surge Contact	Surge	Surge Sportwrap	Surge Mini	Women's Surge Mini	Flex	Trax	Momentum	Women's Momentum
Sweat Proof
Waterproof
Secure Fit with Included Ear Tips	(5 ear tip sizes)	(5 ear tip sizes)	(5 ear tip sizes)	(5 ear tip sizes)	(5 ear tip sizes)	(3 ear tip sizes)	(5 ear tip sizes)	(4 ear tip sizes)	(5 ear tip sizes)
Sports Performance
Hydrodynamic Design
Amplified Bass
Remote + Mic
Special Cable Feature			Sportwrap Neckband				Moldable Memory Wire / Quiet Cable	Reflective Cable	Reflective Cable
Available Colors	Black/Blue	Black/Blue	Black/Blue	Black/Blue	White	Onyx Black, Steel Gray, Power Pink, and Super Hero Blue	Black and Green	Black	Cyan, Purple, Pink, Teal, and White