Features & details Wireless Bluetooth earbuds engineered by Bose for your best workout yet.. Bose lifelike sound: Makes your music sound like the performer is right there beside you, pushing you to go one more mile or do one more rep. Secure and comfortable earbuds: Customize your fit with the included 3 sizes of StayHear Max tips that won’t hurt your ears and won’t fall out no matter tough your workout is. Weather and sweat resistant earbuds: IPX4 rated, with electronics wrapped in special materials to protect from moisture wherever you exercise Clear calls: A beam forming microphone array separates your voice from surrounding noise so your callers can hear you better. Simple touch controls: Instead of buttons, the capacitive touch interface lets you swipe up and down for volume control (opt in feature via Bose Music App), tap to play or pause music, answer calls, and more. Long battery life: Up to 5 hours per charge with the included charging case, plus up to 2 more hours with a 15-minute quick charge on the go.