The JOYO BAATSIN green effector offers a variety of effects. - Brand: JOYO - Model Name: BAATSIN - Color: Green - Number of Control Knobs: 4 - Switch Type: Toggle switch Operation has been confirmed. This is a listing for the main unit only. The sound output is good. Velcro is attached to the back. This distortion effector was created after researching the preferences of many guitarists. It selects from 8 classic overdrives and distortions, and ultimately completes one pedal with a pure analog circuit. It's a cost-effective pedal that allows you to enjoy various genres of music with just one unit. It can also be used when you want to try various analog distortions, such as those found in synthesizers.