Features:Classic analog flanger sound with filter mode and oscillator effects.2 working modes: Normal(undulating electricity sound)/ Filter(freeze the flanging effect, create a static filter sound).With COLOR, RANGE and RATE knob for adjusting the parameters of the effect.Micro size and full metal shell, portable and durable.With true bypass footswitch and LED indicator light.Control Knobs:COLOR-- adjusts the feedback of flangerRANGE-- adjusts the limit range of sweeping scope in Normal mode and manually adjusts the filter matrix in Filter modeRATE-- adjust the speed of flanger in Normal mode and it will be disengaged in Filter mode