Marshall's heavy duty PEDL-91003 footswitch will allow you to enjoy hands-free control of a wide range of your amp's functions, utilizing two dual-latching switches.
Two LEDs indicate whether the switches are on or off. A stereo jack plugs into your amp's pedal connection. The PEDL-91003 is designed to work with Marshall DSL401, VS100R, SV100RH, and VS102R amplifiers.
The Marshall PEDL-91003 is substitute (and can be used to replace) PEDL-00013, PEDL-00016, PEDL-00029, PEDL-90009 and PEDL-910001