Please settle this argument

The people on here know a lot about Journey! I hope you can help me settle this argument with my sister.
We have seen Journey 3 times this summer with the new lead singer and were lucky enough to get great seats! We had so much fun! There is a pedal on the floor that Jeff uses during the concert. My sister said he uses it to help him hit the high notes? I told her she was wrong that he didn't use anything to hit the high notes and that the pedal must be for something else. Does anyone know what it is?
We have seen Journey 3 times this summer with the new lead singer and were lucky enough to get great seats! We had so much fun! There is a pedal on the floor that Jeff uses during the concert. My sister said he uses it to help him hit the high notes? I told her she was wrong that he didn't use anything to hit the high notes and that the pedal must be for something else. Does anyone know what it is?