Xotic BB Preamp Overdrive Guitar Pedal w/ 3 Cables Capable of a 30dB+ clean boost with an adjustable 15dB 2-band active EQ, adding a wide range of harmonic content to your ideal sound Uses a pre-gain stage, allowing the pedal to go from a very pristine clean to a very smooth, compressed, overdriven sound True bypass eliminates any signal interference when switched off Can be used with 9V battery