Since its release in 1981, the workhorse SD-1 Super Overdrive has been the core gain pedal for generations of players across every musical genre. Based around the revolutionary asymmetrical clipping circuit from the OD-1 Overdrive—one of the three original BOSS compact pedals from 1977—the SD-1 delivers rich, smooth, and highly musical overdrive tones that continue to inspire guitarists everywhere.
 
-On/Off foot Pedal switch Rate knob
-Level knob
-Tone knob
-Drive knob
-1/4" mono input and output jacks
-DC 9V 10 mA power in jack
-Alkaline battery: Approx. 90 hours or carbon zinc battery approximately 60
-buffered bypass