The Strymon Orbit dBucket Flanger Pedal gives you spot on recreations of the best vintage analog flangers ever made - all done with superb engineering for truly authentic tones. They've even included out of bounds features like through zero flanging. It's true bypass of course and supremely controllable with an expression pedal, plus a favorite preset, top notch analog front end/output sections and low power consumption. Made with their dBucket algorithm, this pedal delivers on every count and then some with 3 LFO types -log, lin, through zero, plus 3 Feedback types -positive, negative, pos/neg. Use your expression pedal and you've got selectable control over any knob parameter too. Powered with a standard 9V center negative DC supply. This Strymon Orbit dBucket Flanger Pedal is as good as it gets and then some.