The successor to the Boss HM-2 Heavy Metal, the original metal distortion. While often overshadowed by the massive sales of the Metal Zone, the HM-3 boasts a sound characterized by slightly rougher, thicker tones, in contrast to the MT-2, which became a benchmark for modern metal sounds. Purchased 30 years ago and used for 3 years, it has been stored at home in an effects case for 27 years. This is a sale of the unit only. There are scratches on the effects unit itself. Please refrain from purchasing if you are overly concerned about condition. Thank you for your understanding.