JBL Endurance Run 3 Wired Earphone Color:Purple Equipped with "F-LINK port" that

Equipped with "F-LINK port" that optimizes internal pressure inside the housing

Perfect Compatibility: Works with various OS

An ear hook is effective in reducing touch noise

User Documentation

Compatible with Sennheiser HD598 (CS/SE/SR)

JBL Endurance Run 3 Wired Earphone Color:Purple Equipped with "F-LINK port" thatNEVER HURT, NEVER FALL OUT. Results matter, and when you have the perfect headphones theres nothing standing in between you and your workout. With their FlipHookTM design, they adapt to an in ear or behind the ear fit for added convenience. A combination of comfortable and soft ear tips and TwistLock technology means these buds are fitting securely in your ears and guaranteed never to hurt or fall out. And if you thought few drops were going to ruin