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This is the tremolo pedal from Donner Company with the name of Ripple, which is also a pure analog circuit tremolo pedal. And maybe it’s the smallest analog tremolo effect pedal ever. If you’re looking for tremolo tone, you could check out the Donner Ripple Pedal. With 100% pure analog goodness for guitar tone needs. Although Ripple has a small size, it is equipped with complete basic adjustment knob. Classic tremolo effects with a huge range of speed and depth. There are three function knobs, namely DEPTH, COLOR and SPEED. DEPTH is used to set the effect depth. COLOR is to set the effect brightness. SPEED is used to set the effect speed. Two models: MOD and NORMAL. True bypass switch lets your instrument’s signal pass through a non-electronic bypass line when the effect is disengaged, feeding your amp with direct, unaltered signal from your instrument.