The Bad Stain Constellation flanger is an analog pedal that features three knobs and bullet shell switch to activate a “Smudge” feature that adds waves to the effect. The “Warmth” knob adjusts the brightness of the effect and the “Depth” adjusts the the range of the effect, and the “Speed” adjusts the speed of the effect. The Constellations compatible with any 9 volt DC power supply (Not Included). However, we recommend using a Bad Stain 9 volt power supply because we make more money that way. If you’re not 100% satisfied with the BSNW Constellation Pedal, you should probably buy a different pedal.