Fender Accessories 099-4051-000 2-BUTTON VINTAGE-STYLE FOOTSWITCH (RCA JACKS) Fender& offers a wide selection of footswitches designed to work with many vintage and newFender amplifiers. Please see sku descriptions to ensure proper ordering for your particular amplifier. 2 Button Fender& offers a wide selection of footswitches designed to work with many vintage. Please see sku descriptions to ensure proper ordering, 2 button.