The heart of the unit is a mos-fet transistor. The inputs are high impedance, meaning that there is no ill effect on the dynamics or the sound quality of the signal from the pickup. The circuits react very dynamically to every nuance of sound. Two clean booster circuits in one unit! The first circuit contains one Boost pot meter, to set the gain level of the circuit, while the other circuit contains a Boost pot meter, for gain levels, and a Level pot, which controls the output level of the circuit. The unit has two foot pedals for separate control of the two circuits. The pedal uses True Bypass technology, meaning that even when switched off the pedal perfectly maintains the original tone of the instrument.