BRAND NEW IN BOX SEALED Skullcandy Crusher Wireless Over-the-Ear Headphones Features Bluetooth interface Enables simple wireless pairing with your Bluetooth-enabled device. Built-in microphone Enables simple hands-free chatting via a compatible device. Battery Life Up to 40 hours of Bluetooth wireless battery life 40mm drivers Deliver powerful sound. 32 ohms impedance To efficiently conduct power. Stereo design Delivers crisp tones. Model Number:S6CRW-K590