The MXR M133 Micro Amp Boost Pedal is a high-quality guitar effects pedal manufactured by Dunlop under its MXR brand. This pedal is designed to provide a boost in volume and gain, enhancing the overall sound of an electric guitar. With its compact size and model number M133, the MXR Micro Amp Boost Pedal is a versatile and reliable option for guitarists looking to add more punch and drive to their sound.