Messner Transparent Light-Gain Overdrive It is designed to preserve the natural voice of your guitar by not coloring your tone, but giving the user the ability to dial in and out the exact amount of tone they desire. Toggle switch allows the user to bypass the clipping diodes from the circuit in the open position and employ them in the closed position, allowing a wide range of breakup from subtle to dramatic. The color control works in all modes, giving you the ability to dial in brighter tones as you turn it up and darker tones when turned down. Made in America; includes a 5 year warranty