MOSKY OCD Overdrive Pedal Mini Portable Stompbox Guitar AMP Effects Pedal White Obsessive Compulsive Drive Compatible with most electric guitars.For wide-ranging use. Drive,Volume & Tone Controls: pretty standard fare one most overdrives for letting you dial in the gain, adjust the output volume, and find just the right tonal balance. HP/LP Switch: The High-Peak function gives you increased distortion and low-end, thickening up your sound for a more British flavor. The Low-Peak mode gives you a more accurate rendition of your sound with very little coloration of your tone . 9-Volt or 18-Volt Power: Use a standard 9-volt adapter or plug in an 18-volt power supply for even more headroom. Very small and exquisite.