In great condition, works perfectly

The Marshall Jackhammer (JH-1) is a high-gain distortion and overdrive guitar pedal featuring dual modes, a sweepable mid-contour EQ, and a rugged metal housing.

Two Modes: Switch between an Overdrive mode (reminiscent of a cranked JCM800/900 crunch) and a heavier Distortion mode (modeled after modern high-gain amps like the JCM2000). [1] Control Layout: Uses stacked dual-concentric pots for Gain/Volume, Bass/Treble, and Contour/Frequency. [1, 2, 3] Advanced Mid-EQ: The Contour and Freq knobs let you scoop out midrange frequencies and precisely target where the frequency scoop happens. [1, 2]