Built for Fitness: Tackle even the toughest workouts with a design that's durable and sweatproof to withstand any element. Premium Wireless Sound: Get sound that's precision engineered for crisp audio, powerful bass and dynamic range enhanced by WavesMaxx audio. Music & Call Controls: Adjust sound, pause or change songs and answer or end calls with the streamlined 3-button control box. Adjustable Cable: Adjustable cable ensures that headphones stay comfortable and secure during high-intensity workouts and all day. Secure, Personalized Fit: Optimize comfort, security and sound by customizing Flyer with interchangeable ear tips, wings and fins in different sizes. Long Battery Life: Enjoy up to 6 hours playtime on a full charge. Plus get an extra hour of playtime fast with a 15-minute quick charge.