Ahhhhh . . . My first "pedal". My mom bought one of these from my guitar teacher for me for Christmas 1982. It cost $20 used at that time, pretty good deal for what I got. There are two knobs, and a tone switch.
This pedal has it's own unique sound. They all sound different today, due to the germanium transistors. I have found that the end-note decay fades first. These sound great with just about any guitar/amp combination. These were dirt cheap for years, then Kurt Cobain decided to use one and wham, the prices skyrocketed. Oh well! I bought this one in Las Vegas in 1998. I sold it to a Sacramento collector in 2001.