TrembluR Tremolo is a true analog sinewave tremolo sound from 60's. The circuit based on EA Tremolo but modified add input buffer to the circuit and reverse speed control from original design. Easy to use just 3 controls are Depth, Speed and Output If you turn off Depth and Speed control this pedal can be used as Level Booster. This device also adds LED tempo blink when dial speed knob easy for setup with band tempo.