Wireless Bluetooth earbuds engineered by Bose for your best workout yet.Note : If the size of the earbud tips does not match the size of your ear canals or the headset is not worn properly in your ears, you may not obtain the correct sound qualities or call performance. Change the earbud tips to ones that fit more snugly in your ears Product Note : If the size of the earbud tips does not match the size of your ear canals or the headset is not worn properly in your ears, you may not obtain the correct sound qualities or call performance. Change the earbud tips to ones that fit more snugly in your ears Bose lifelike sound: Makes your music sound like the performer is right there beside you, pushing you to go 1 more mile or do 1 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 beamforming 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 .