It's a chainsaw in a box. It has four knobs you can dime. Once the knobs are dimed, you can get about your regular day job of ritual sacrifice, actual murder etc. Good for playing Swedish music that isn't Abba or Millencolin.

Model: Boss HM-2 Heavy Metal
Made: Japan, Nov 1985
Serial: 603300
Type: distortion
Power: standard 9v DC negative power supply (not included)
Equivalent new street price (approx): N/A
Mods: none
Accessories: none

Condition notes: used, no major marks. Tested and fully functional.
Overall: very good condition (8/10)