Using these effects units is a breeze. First, connect your instrument to the input of the desired effect unit. For most units, you can adjust the sound using the knobs on the front panel. For example, turn the 'Mix' knob to blend the dry and effected signal. When using multiple units in the bundle, connect them in series for a more complex sound. Make sure to keep the units away from moisture and extreme temperatures. If the unit gets dirty, use a soft, dry cloth to gently wipe it. Also, when not in use, unplug the unit to save power and extend its lifespan.