The FS-1 single-button footswitch from Orange gives you more control over these Orange amps: Terror Series: DT30-H TH Series: TH30H TH30C TH100H AD Series: AD30C AD30H Custom Shop: AD50 RETRO50 Crush PiX Guitar Amps: CR20LDX - Note: LED will not light CR35DLX - Note: LED will not light