Top features: – Wireless Bluetooth for instant, hassle-free audio access to your devices – 40-hour battery life for a longer-lasting wireless experience – Slider to adjust bass so you can feel it – Premium design for your comfort and appreciation Wireless BluetoothWhether travelling, at the gym, walking around town or simply relaxing on your sofa, these Skullcandy Crusher S6CRW-K591 Wireless Bluetooth Headphones give you hassle-free mobility without wires getting in the way. Pair your Crusher S6CRW-K591 with your computer or mobile phone, and enjoy music whilst still being able to take incoming calls. After the initial setup, these headphones automatically pair with all your devices. 40-hour battery life With up to 40 hours of battery life, the Crusher lets you enjoy your music for much longer without being tied down to your device. SliderExperience stereo bass you can feel thanks to dual, custom-tuned audio drivers. The S6CRW-K591 features a slider on the earcup that lets you crank up the bass to where you like it, delivering the intense, controlled and punchy sound of a traditional speaker right in your ears. Premium design From the leatherette headband and cushy oval earcups with memory foam, to the foldable design and elegant carry pouch, these Skullcandy headphones boast premium material and precision engineering so that your acoustic experience is refined in every detail.