The Hi-Mu is designed to excel as a singing Lead Voice, powered by 4 x New Old Stock Full-size JFETs configured as Mu-Stacks" to behave in an amp-like manner, meaning it responds dynamically to the input from your hands and guitar. It offers great clean-up by lowering the guitar's volume knob and has ample midrange, clarity, sustain, harmonics. "¢ 3-position Bass switch is used in conjunction with the EQ knob to enhance or remove Bass frequencies. "¢ EQ knob is not a conventional Hi-Cut, rather its capable of drastic tonal changes ranging from rich and smoother to sharp and cutting. "¢ Sustain Knob makes the sound more distorted. "¢ Full-Bypass with LED status. "¢ Power: battery or 9-18 Volt power supply. "¢ 100% handmade in the USA."