I dont believe these are authentic Clarks shoes. When I finished the run the controls wouldnt work at all. Fidandomi delle recensioni 5 stelle (nomen omen) ho acquistato questi auricolari. Es ist Dezember und bei minus 5 Grad sind die Füße immer noch warm. Once I did that, it locked on and I was able to pump up the tire. The battery lasts about six hours if your volume isnt super high, less if youre totally rockin out. -The manual that came with my product simply states that the NUMBERS are to "Enter selected songs, radio, and frequency"-When the Numbers are hit in FM mode, it messes up the stations and you have to search the station you want all over again. This was the 3rd pair I had bought and third time was a charm! This sounds just as clear as them. I had to wash my face off after using so my pillowcase dont turn a God awful color and get destroyed.