Let nothing stop your workout. Wireless and IPX7 waterproof, the JBL Endurance SPRINT headphones are always up for a run, and with Speed Charge you can get an hour of listening time after charging the 8hr battery for just 10 minutes. Supremely comfortable with FlexSoft ear tips and TwistLock technology, these secure fit buds were designed from the ground up to amplify your workout. They're guaranteed never to hurt or fall out, while touch controls let you easily manage music and MagHookTM lets you secure them conveniently close at hand when you're done using them. FeaturesLet nothing stop your workout. Wireless and IPX7 waterproof, the JBL Endurance SPRINT headphones are always up for a run, and with Speed Charge you can get an hour of listening time after charging the 8hr battery for just 10 minutes. Supremely comfortable with FlexSoft ear tips and TwistLock technology, these secure fit buds were designed from the ground up to amplify your workout. They're guaranteed never to hurt or fall out, while touch controls let you easily manage music and MagHookTM lets you secure them conveniently close at hand when you're done using them.