The Radial JR1-M footswitch can be hooked up to various bits of Radial kit for increased control. It's unlatched and will only change status when engaged.
Radial's JR1-L is a latched or locking footswitch. You have to press the switch to turn the ignition on and also press it again to turn the ignition off.
Simple solution for guitarists who want to use two speaker cabinets on an amp with only one speaker output.
The Radial JR-5 allows foot control of the Radial JX44 / JX44 V2 or JX42 / JX42 V2.