Yellow AC Booster effector with true bypass function. Product Rank: B+: Some scratches, but no problem for normal use. By using the highest quality parts, it produces a warm and pleasant sound. With the ultra-wide range gain control, you can get enough gain to use it as an overdrive/distortion pedal when turned up to the maximum. Not only does it boost the gain, but it also has Treble and Bass controls, allowing you to adjust the sound to your liking. True bypass eliminates signal interference when the switch is off. Can be used with an AC adapter (sold separately) or a 9V battery. - Model: AC Booster - Color: Yellow - Function: True Bypass - Brand: Xotic Effects - Serial Number: ACB-15561 Thank you for viewing.