Boss fs5L latching footswitch
FS-5U/-5L: Foot Switch. Features. 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, with a standard 1/4″ connector, for use with keyboards, sequencers, outboard gear and recording devices.