Key Features. Soft flexible & secure-fit earloops provide a comfortable fit & remain stable during your most rigourous workouts Eartips allow you to hear your surroundings for safer training in any environment Durable sweatproof & waterproof design can withstand your most rigourous workouts rain or shine Up to 8 hours listening time. As Unstoppable As You Are When it comes to your workout nothing gets in your way. Stay focused & distraction-free with wireless sport headphones that stay comfortably in place. Back Beat FIT provides superior stability with a behind-the-ear design & comfortable eartip. The only reminder that you're wearing them is the rich sound of your favourite playlist or podcast pushing you to your next personal best. Engineered For Sport Ready to go the extra mile or ten? Flexible & durable Back Beat FIT pushes you further withstanding the rain or a rinse under the tap with a waterproof design that meets the IP57 rating & an additional sweatproof nano coating. & whether you wear them running roadside or on the trail the open eartip design lets you hear the sounds around you. You Never Quit Neither Should Your Headphones With up to eight hours of listening from a single charge Back Beat FIT helps you power through a full week of workouts. Subtle voice alerts let you know how much listening time you have left & the 15-minute quick-charge provides an hour of play to get you through the day's challenge..