Bose SoundSport Free Wireless Headphones - Navy/Citron Bose Sound Sport Free headphones are completely wireless, so you can enjoy total freedom of movement with nothing-not even a single cord-in your way. The acoustic package is designed to deliver sound so clear and powerful it will motivate you to go faster, lift heavier and train longer. Bluetooth technology transmits music from your phone to the headphones, so music plays reliably and consistently whether your phone is in your nearby gym bag, pocket or strapped to your arm. Stay hear+ sport tips are built to stay comfortably in place, even when you're training hard. And if you can't find an earbud, all hope is not lost. You can track down lost earbuds using the Bose connect app's “find my buds” feature. It shows when and where the earbuds were last connected to your phone. Also, an audio signal from the headphones can Alert you to their location. Water-repellent materials inside the earbuds help keep moisture out. Off a single charge, the earbuds play for up to five hours, and the fully charged case gives you an additional 10 hours of music, ready to play when you are. When not in use, the charging case is designed with built-in magnets to keep the earbuds securely in place. You can even take calls right through the earbuds and access your phone's Siri or the Google assistant. Features: Clear and powerful sound Bluetooth technology transmits music/calls from your phone to the headphones Built to stay comfortably in place Track down lost earbuds using the Bose connect app's “find my buds” feature Water-repellent