Check the listing for details. ART LSwitch – Latching Switch for Effects or Amps. Condition: New. Listed at 55.99 USD. The LSwitch is a normally closed (NC) latching footswitch for use with various effect units or amplifiers that have an external footswitch jack. The onboard LED is supplied power by the switching circuitry on the host device; not all host units will necessarily power the LED properly, but the footswitch will work in spite of this.