Using the Electro - Harmonix Nano Overlord is easy. First, connect your instrument (guitar, bass, or keyboard) to the pedal. Then, plug the pedal into your amplifier. You can switch between the Normal and Boost modes with the pedal's switch. In Normal mode, you'll get low - to - medium gain sounds. If you want more distortion, switch to Boost mode. Adjust the Dry blend control to mix in the clean signal, which is really handy for bass and keyboards. Use the 3 - position input level selector switch to set the right input level, and tweak the 3 - band EQ to shape your sound. When you're done using it, turn it off to save power. Keep it in a dry place to prevent damage. If it gets dirty, use a soft, dry cloth to clean it. Avoid exposing it to extreme temperatures and humidity to ensure it works well for a long time.