SAFETY: Stay visible in the dark with the reflective finish and train safer with Always Aware eartips that are designed to let in ambient sound, allowing you to simultaneously listen to music and hear your surroundings. COMFORTABLE DESIGN: BackBeat FIT wireless headphones have a soft, flexible and secure fit earloop design that provides a comfortable fit and remains stable during your most rigorous workouts. LONG LASTING BATTERY: Bluetooth headphones have up to seven hours of wireless power so you can move more and charge less. WATERPROOF AND SWEATPROOF: IP57 rated durable, sweatproof and waterproof design protects the earphones from sweat, rain, and spills and can withstand your most rigorous workouts. MY TAP: New My Tap offers feature customization through the Plantronics BackBeat app. Set a timer, start a stopwatch or select your favorite playlist directly from your earbuds without ever interrupting your workout