The Bad Stain Eden tremolo effect pedal is a perfect addition to anyone’s arsenal. The digital pedal has a solid sound, and features a genuine shotgun shell around the power light. The “Speed” knob adjusts the rate of the tremolo effect, and the “Depth” knob adjusts the amount of the effect in the mix. The Eden is 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 Eden Pedal, you should probably buy a different pedal.