Plantronics BackBeat FIT 350 Wireless Headphones, Stable, Ultra-Light, Sweatproof in Ear Workout Headphones, Black and Gray. Keep it moving with the discreet and ultra-light Backbeat FIT 350 wireless sport earbuds. With secure-fit ear loops, patent-pending ear tips and the 2-in-1 stability clip, they’re designed to stay in place during even your most rigorous training sessions. And with up to six hours of power on a single charge, you can listen from workout to weekend. Purchased for my husband but he never used them. Comes with all original packaging and contents.