The Marshall PEDL-91016 Footswitch is a robust six-way footswitch that can be used with Marshall JVM4, DSL40CR and DSL100HR guitar amplifiers.
10/10 I own a dsl100 and used the regular 2 foot switch for an event and it was great but after getting the 6, the expansionist is wonderful, 1, clean, 2 crunch, 3, Od1, 4,od2, 5 master, and 6 fx loops. perfect for getting solos volume with a simple switch. last show with is had absolutely 0 problems.