JBL Pure Bass Sound: Get the most out of your favorite workout playlist with rich bass from a 10mm dynamic driver that delivers bold sound when you need it most. Up to 50 total hours of playback with speed charge: Whether you measure your energy output in miles, pounds, or minutes, the JBL Endurance Peak 3 can match you beat for beat, with up to10 hours of battery power in the earbuds and 40 in the case. IP68 dust and water proof: An IP68 rating means the JBL Endurance Peak 3 earbuds are ready for your most active adventures, rain or shine. And they'll endure for 30 minutes at depths up to 1.5 meters of salt or fresh water. So you can surf with your earbu Ambient Aware & Talk Thru: Whether you're out for a run or in the zone at the gym, TalkThru makes it easy to make and hear calls anywhere. And with Ambient Aware, you can stay alert to your surroundings without removing your headphones. 4-Mic Crisp, Clear Calls: Even on a windy bike trail, your voice will be heard thanks to dual beamforming mics in each ear help to ensure clear communication.