Feel the bass in your bones with Crusher Evo XT the latest advancement in the famous Skullcandy Crusher line. Patented Adjustable Sensory Bass technology is an experience that you can t get in any other headphones. And now you can even customize the sound to your unique hearing through a quick audio test in the Skullcandy App. So you ll hear the music exactly the way it was meant to be heard. Critical controls call track change volume and Crusher Bass are conveniently located with easy-to-use tactile buttons. Tile™ Finding Technology lets you ring your headphones if they are ever lost or misplaced so you ll never return home without them. Rapid Charge capability provides 4 hours of listening time on just 10 minutes of charge and a full charge lets you feel the music for an amazing 40 hours. Crusher Evo XT is also travel-ready with it s fold flat design and included travel case.