JBL Endurance SPRINT Waterproof Wireless In-Ear Headphones Earbuds Blue New in the box and will be sent fast Description Stay active with these JBL Endurance SPRINT in-ear wireless headphones. Speed charge batteries provide up to an hour of listening after only a 10-minute charge and up to 8 hours when fully charged. These JBL Endurance SPRINT in-ear wireless headphones stay comfortably in place thanks to their MagHook design and FlexSoft technology. Features Bluetooth interface Enables simple wireless pairing with your Bluetooth-enabled device. Rechargeable battery Offers up to 8 hours of use on a charge. Water-resistant Helps prevent water from entering the headphones. In-ear design Fits securely and directs music into your ears for full, uninterrupted audio. Built-in microphone Enables simple hands-free chatting via a compatible device.