Plantronics BackBeat GO 3 - Wireless Headphones - Cobalt Black with Charge Case Wireless Earbuds with High-Resolution Sound: Custom speakers and tuning deliver vivid, high-resolution sound, while the earbuds block out noise and seal in a rich listening experience. Stable, Comfort-Fit Eartips: We 3D-mapped the human ear to create comfort-fit eartips that stay put even when you dont. Sweatproof: A nano-coating by P2i protects the earbuds from light rain, humidity, and sweat. Wireless Control: Convenient inline controls let you adjust volume, skips tracks, take a quick call, or ask your smartphone to play a favorite playlist. Long Lasting Battery Life: Earbuds have up to 6.5 hours of non-stop listening while charging case gives you up to 13 extra hours of listening (two full back-up charges) from its built-in, rechargeable battery.