No wires mean no limits. And 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. Worried your earbuds will fall out during your workout? don't be. Stay hear+ sport tips are ..