Using this Electro - Harmonix guitar effects pedal is easy. First, connect your guitar to the input of the pedal and your amplifier to the output. You can power it with the included 9V battery or use an optional EHX 9.6VDC - 200mA power supply. When you step on the pedal, the LED will light up to show that the effect is on. Enjoy the great sound with clear string separation and long - lasting sustain. For maintenance, keep the pedal clean and dry. If you're using a battery, replace it when the sound starts to fade. When not in use, store it in a safe place to avoid damage. Make sure to handle it gently to keep it working well for a long time.