Free yourself from all constraints and be ready to reach a new level of performance with the JBL Endurance PEAK headphones. Enjoy the freedom of a fully wireless workout without the need to recharge the headphones for as long as 28 hours (4h + 24h backup power). But if you feel like you still have more to give, it only takes 10 minutes of recharging for another hour of motivating music. Thanks to the PowerBook technology, the JBL Endurance PEAK headphones conveniently power on and off as you start wearing them, so they're ready to attack each and every workout whenever you are. In addition, the PowerBook lets you switch off your TWS buds without reaching for your charging case each time. With their IPX7 waterproof design, the JBL Endurance PEAK is also guaranteed never to hurt or fall out and features a flexible around the ears hook for extra security. In addition, the JBL Endurance PEAK headphones work in both mono and stereo mode and allow you to seamlessly control your sound or calls directly on the earpiece using their convenient touch controls. And when your workout is over, simply put your headphones in the rugged storage case.