NeverHurt, Never Fall Out. Exercise harder, longer. The flexibility, powerful sound, and rugged design of your JBL Endurance Peak 4 will match you beat for beat. JBL Pure Bass Sound with Spatial Sound fuel your workout from the bottom up, and no matter how intense your moves get, the ergonomic fit of the TwistLock design means they'll always stay in and stay comfortable. Most of all, a waterproof and dustproof IP68 rating means the weather will never give you an excuse to stay home. Block out distractions with Adaptive Noise Cancelling or stay in touch with your surroundings with Ambient Aware. Running in the wind. Your calls will sound perfect as if at home, thanks to the 3 mics on each bud. Up to 48 hours of battery life gives you the musical motivation to run a marathon every day for a week before you need a recharge.The JBL Headphones App allows you to customize your sound and the earbuds settings to your likes. Go wherever your workout takes you with JBL Endurance Peak 4.