Fender Replacement Footswitch, Vintage One Button, RCA Plugs Non-Original Replacement Footswitch For Fender: 099-4050-000 One Button Amp Footswitch Vintage Style RCA Plugs (Not 1/4) For use with: Princeton, Vibro-Champ, (Original) Fender Reverb. (All vintage amps with a single footswitchable on/off function requiring RCA connectors 16ft Cable