NUX MG-20 Electric Guitar Multi-effects Processor with Drum machine Looper Function Expression pedal Metal Shell NUX MG-20 Guitar Multi effects processor built-in Drum and Phrase Loop Machine with New CTRL Footswitch Big colorful LCD display Built-in Tuner, Built-in MP3/WAV Player and Independent operator interface with Expression pedal It is a powerful floor processor effect with 60 Effect Models, 36 User Presets + 36 Factory Presets TSAC-True Simulation of Analog Circuits technology,Natural and true tone WAH Pedal and Volume Pedal can be Switched Directly, USB Port for Updating Software and tone editing