The MXR M233 Micro Amp + is a boost pedal that combines the classic Micro Amp circuit with additional tone-shaping controls. It delivers up to +26 dB of clean boost to enhance solos or drive an amp harder. The pedal features separate Bass and Treble controls for adjusting low and high frequencies. It is designed to maintain clarity and preserve the character of the guitar and amplifier. The compact housing fits easily onto any pedalboard. It operates with true bypass switching.