The Boss SD-1 Super Overdrive is a classic overdrive pedal that has been a mainstay on countless guitarists' pedalboards for decades. With its simple and intuitive controls, the SD-1 offers a versatile range of overdrive tones that can go from warm and subtle to crunchy and aggressive.

The SD-1 features a Drive knob that controls the amount of overdrive, a Level knob for adjusting the output volume, and a Tone knob for shaping the overall sound. The pedal can be used to add some dirt to a clean amp or to push an already overdriven amp into high-gain territory.

One of the most famous users of the Boss SD-1 is Stevie Ray Vaughan, who used the pedal to help achieve his signature tone. Other notable users include John Mayer, Eric Johnson, and Mike McCready of Pearl Jam.

The SD-1 is built like a tank, with a sturdy metal chassis that can withstand the rigors of live performance and touring. The pedal runs on a single 9-volt battery or an optional AC adapter, and features a true bypass switch to ensure that your tone remains uncolored when the pedal is not in use.

Whether you're looking for a subtle boost to your tone or a full-on overdriven sound, the Boss SD-1 Super Overdrive is a reliable and versatile pedal that can help take your playing to the next level.

This unit has a few scratches but is overall in good condition.

This unit does not come with a bag or case and does not include a power supply.

This unit has been tested and is in working order.