The CKK Electronic Frogman Tremolo Pedal is designed to get your tone bouncing around the stage. The pedal recreates the optical tremolo of the Fender Twin Amplifier, and provides a colour-free tone with wide ranging control over the tremolo effect. The Frogman's tremolo is produced by an optocoupler which creates a more natural sound with no impact on the frequency range of the incoming signal. The pedal's controls are very powerful and can create all manner of effects from a subtle thickening of your tone to a full-on psychedelic soundscape. Both triangle and square waves are available and the circuit is housed in a rugged chassis. The Frogman is a high quality pedal at a great price point with an organic tremolo sound; it would make a welcome addition to any guitar rig.