Micro-sized sweat-proof sport Bluetooth buds delivering superior audio performance (music & calls) rivaling the best in wired headphones. Patented Secure fit for ultra comfort, ready for anything you can dish out on the trail, in the gym or on the slopes. Breakthrough exclusive super-capacity Battery HD technology doubles Jaybird BlueBuds X playtime to a solid 8 hours, offering a full week of workouts, or a full day of listening.