Get the bass to push you right when it matters most. With a battery that lasts as long as you do, you can get motivated on the last few meters. The Endurance PEAK II adapts to you, not the other way around. The earhook's flexible wire allows you to adjust the headphones to your size and preferences. Plus, you can focus on your goals as the music starts and stops with you, and the operation is so intuitive it almost reads your mind. It doesn't matter which headphone you take out of the box first. You can answer calls, adjust the volume or use the voice wizard in each ear to stay flexible and keep your momentum going. Stay in touch with your people and keep control of the music without interrupting your workout. Don't worry. Get as wet as you want. Rain or sweat, no problem for Peak II.