Bose SoundSport charging case, Black Micro USB for charging sound sport wireless or sound sport Pulse wireless headphones on the go.Wired Charging. Built-in rechargeable battery extends listening time up to 18 hours Compact, durable case protects your headphones as they charge A quick 15-minute charge gives you up to 1 hour of play time. The case reaches full charge in less than 2 hours. LED battery indicator quickly shows status for both headphones and charging case Connectivity technology : Wired/Wireless