Volume remote for amp?

I've looked all over for this but to no avail. All I want is something to control the volume (aka gain or w/e) of my amp from the front seat. It's an audiobahn and there's an outlet on it that looks like a phone jack and says "remote." Any ideas?

well go but a external remote off ebay or soemthing. ive even got a kicker remote that came with my amp. guess what my amp was to low a model to even use it so its sjut sitting in my electrical wiring box.