- Completely wireless - W/ advanced technology, SoundSport Free wireless headphones are ideal for a variety of everyday scenes - W/ Bose's original digital signal processing, equalizer optimized to the volume, original sound design realizes clear, balanced, powerful sound regardless of the volume - Even if you have a smartphone in hand, it is a stable sound with no sound cracking or noises even when it is in your pocket or bag - B/c it is a drip-proof specification, you do not need to worry about rain or sweat - StayHear + Sport chip is lightweight and hard to come off, fitting comfortably for a long time - You can use the Bose Connect application to locate lost headphones - Up to 5 hours continuous playback with one charge - By fully charging the case, you can charge twice & play for ~10 hrs. is possible - Bluetooth pairing has voice guidance, easy access and calling to Siri - For use with Apple products