Skullcandy Crusher Evo Foldable Over-the-Ear Headphones, Wireless, Bluetooth, Microphone, 40-hour Playtime, True Black YOU'VE NEVER HEARD SOUND LIKE THISGet ready to experience the patented power of Crusher Bass - now combined with the ultimate audio customization of sound by our partners at Audiodo™. You've never heard your music and movies like this before. Because there's never been anything like it. CRUSHER BASS: NOTHING COMPARES.Skullcandy Crusher is the original, one-of-a-kind immersive sensory bass experience. Turn the slider down for softer bass. Raise it to really crush your bones. Plus, Crusher Evo offers audio quality improvements over the original Crusher, so you'll experience an even wider range of deeper, richer bass. SOUND OPTIMIZED FOR YOU. Audiodo™ technology in the Skullcandy app analyzes hearing in both your left and right ears, then automatically adjusts the sound to optimal levels for your specific hearing. DON’T WORRY, YOU’VE GOT TILE Crusher Evo features built-in Tile™ identification technology. If you ever lose your headphones, you can easily “ring” them from the Tile app. So what might have seemed lost is now quickly found. 40 HOURS OF BATTERY LIFE. You don’t have time to plug in your headphones every time you get back. That’s why Crusher Evo is designed with a full 40 hours of battery life. Plus, whenever you’re low, Rapid Charge gives you 4 extra hours of listening time from a quick 10-minute charge.