[Sweatproof] Not only are the Duet 50 Pros long lasting headphones, they are fully sweatproof and can handle long runs in the rain and snow. The bluetooth wireless earbuds nano-coating creates
IPX-5 rated sweat-proofing [NOTE: Not for Swimming]
[Charges Your Cell Phone] Just plug in the included charging converter cable to the case, and you can charge any kind of iPhone or Android. The small earbuds (audifonos bluetooth inalambricos pequeños) can be an extra power source for your cell phone