FEEL THE BASS, TUNED TO YOU. Get ready to experience the patented, skull-thumping power of Skullcandy Crusher Bass - now combined with the ultimate audio customization of Personal Sound by Audiodo. You've never heard your music and movies like this before. Because there's never been anything like this before. Up to 40 Hours of Battery Life Rapid Charge (10 min = 4 hrs) Adjustable Sensory Bass Personal Sound by Audiodo Built-in Tile Finding Technology Skullcandy App Compatibility Stay-Aware Mode Call, Track and Volume Control Auto Connect Flat-Folding and Collapsible Design Bluetooth (v5.0)