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.Make sure the headphones are at room temperature, between 41° F (5° C) and 104° F (40° C) before charging Connectivity technology : Wired/Wireless