Hand-free Calls! Bluetooth® technology enables hands-free calling, allowing you to focus on your workout. | Secure fit ear hook design provides ultimate stability during workout. When not in use the Magnetic hook provides a convenient storage solution for your headphones. Clip on your shirt or around your bag for easy management. | Thanks to TwistLock™ and FlexSoft™ technologies, these headphones are lightweight and ergonomically built to ensure comfort and stability no matter the workout. | Waterproof! Featuring IPX7, th JBL Endurance Sprint are designed to be used in all weather or sport conditions. Durable and made to last, no matter the elements. | Touch Controls! Allows you to easily manage your music and calls controlling volume, play and pause and track order with a simple touch for extra convenience, so that you can keep going.