This Pedal is discontinued.
Chainsaw distortion
Controls: Level, Color Mix (L, H), Distortion Connectors: Input, Output, AC Adaptor Current Draw: 10 mA (DC 9V) Weight: 400 g (14 oz.) Input Impedance: 1 MOhm Recommended AC Adaptor: ACA Series
http://www.bossarea.com/boss-hm-2-heavy-metal/
Included in 132 Pedalboards, 62 are public: