If the left earbud (where the sensor resides) is removed from the ear or if the sensor is not connected to an app, it stops transmitting data.

Purchasing the SoundSport charging case is recommended, making sure you’ve got a further 18 hours of listening before your next charge. And with redesigned StayHear+ Sport tips built for your toughest workout, you have everything you need to push to the next level. Even if you don’t care about the sports side, the hooks are important because, while the remote is small, the Bose SoundSport Wireless earpieces are quite large. Connection skipping is minimal when running with my phone strapped to my left arm (four times in a week), and no skipping occurs whatsoever when it’s strapped to my right. Because of this difference in design, the StayHear+ Pulse tips cannot be used on the SoundSport wireless headphones or any other Bose in-ear headphones.Battery life is much shorter with the Bose SoundSport Free earbuds compared to the SoundSport Wireless, but the charging case provides an additional 10 hours of on-the-go playtime.

Whether you're on a long run or want to cycle for miles, the SoundSport Headphones have up to 6 hours of wireless battery life so that you don't have to worry about running out of music. Sweat- and weather-resistant StayHear+ Sport tips stay comfortable and secure, even during an intense workout. If you don’t have an NFC-enabled phone, press and hold the Power/ Bluetooth button until you hear the “ready to pair” voice prompt or until the Bluetooth LED flashes blue. SoundSport Pulse wireless headphones use a variation of the StayHear+ tips, with a cutout to accommodate the sensor window.The Beats Fit Pro is a set of true wireless (as opposed to simply wireless) earbuds with IPX4 rating and ANC. SoundSport wireless headphones can be charged by plugging the USB cable supplied in the box into a USB port on a computer or a wall charger (sold separately).