Guitar effect providing kicking of bass frequencies, amplification of your instrument's sound band by up to 20dB, frequency band enhancement range 400Hz - 200kHz, control with a single Booster potentiometer, amplification and distortion of bass guitars and electric guitars, pickup sound, True Bypass, Input / Output Jack, powered by 9V battery or adapter. The Mole is a guitar effect that changes the character of your final sound by boosting bass frequencies up to 20dB. Whether you're playing bass or guitar, The Mole lets you deepen your sound where it's needed.