BOSS FS-5U

They say:

Roland/BOSS offers two types of sturdy metal footswitches for different applications. The FS-5U (silver) is a momentary "unlatch"-type footswitch, and the FS-5L (black) is a latch-type footswitch with an LED to indicate status. Both footswitches can be connected using ordinary guitar cables. Please consult your owner's manual for compatibility.