Take control of your Blackstar ID: Core Stereo 20 or ID:Core Stereo 40 amplifier with the 2-button Blackstar FS-11 foot controller. The all-metal FS-11 offers two modes of operation to make your gig and rehearsals run smooth. Mode 1 offers the standard channel switching and effects on and off functions. Mode 2 lets you scroll up and down through your presets so you can quickly get to your next sound. Capture the full functionality of your Blackstar ID:Core Stereo amp with the Blackstar FS-11 Footcontroller!