Boss HM-2 Heavy Metal

The Legendary HM-2. Originally designed as an "amp in a box" Marshall styled pedal it grew rapidly in popularity in heavy metal genres. Most notably Swedish thrash and death metal bands used the HM-2 such as Entombed, Grave, Dismember and Unleashed. 

With a master level control to control how loud the pedal is, distortion knob to control how much gain/distortion is being sent through the amp and the low/high EQ controls to push how much low end or high end that is being sent through.

Secondhand. As this is a used HM-2 it has gone through a little bit of modification with the knobs being replaced and a little bit of cosmetic wear but the pedal is fully functional.