The Twister is a versatile analog flanger stompbox from budget guitar effects maker Tomsline. Dial in everything from a subtle flange to a screaming jet engine fly by with the Color, Range, and Speed knobs. Use the two position toggle to switch from Normal mode to Freeze mode to give the flange effect a simpler, more vintage feel. The Twister features Tomsline’s patented stop bar design to keep your foot from messing up the pedal’s settings when you stomp on it. https://reverb.com/item/84056890-tomsline-model-atr-3-twister-analog-flanger-pedal-with-true-bypass?bk=