en tout cas, pour quasiment toutes les pédales , c'est écrit, par exemple pour l'overdrive bass :
Take off with overdrive, distortion or a combination of both in just one powerful pedal! The sound was modeled after* Boss® OS-2. We’ve included dedicated Level, Tone, Drive and Color controls for effortless sound shaping. We’ve included a status LED for effect On/Off and battery check, and you can run your OD100 on a 9 V battery or a DC power supply (not included). For absolutely noise-free operation, a first-class electronic On/Off switch is integrated. Get unapologetic distortion while preserving the character of single-coil guitar pickups.