The Bad Stain Star Valley phaser is an analog pedal that features two different styles of phaser. Set the phaser to STUN for a classic sound, or flip the mini toggle switch down to set it to KILL to produce a more powerful phaser sound. Use the INTENSITY knob to increase the speed of the phaser. The Star Valley 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 Star Valley Pedal, it sucks to be you.