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 PowerHook™ technology, the JBL Endurance PEAK headphones conveniently power on and off. Complies with CE, FCC, RoHS, UL.