Yurbuds Endurance Sport Bundle Includes wireless and wired sweat-proof sport earphones for active use. Liberty Wireless features a behind-the-ear design for added comfort. 6+ hours of music and call time. The Liberty provides a premium listening experience and features a microphone with music control. Inspire 300 (wired) sport earphones feature an in-the-ear design and a one-touch microphone with music and call control. They also feature Quik Clik(R) tangle-free magnets, making the earphones ready to wear and ready to store. Both earphones feature Yurbuds patented TwistLock Technology, guaranteed never to fall out