Using the Behringer FCV100 V2 is easy. First, you can choose to power it with a standard 9V battery or a 12V DC adapter (the adapter is not included). If you're using a battery, keep an eye on the 'low' indicator to know when it's time to replace it. For volume control, connect 1 stereo or 2 individual musical instruments to the pedal. Then, use your foot to adjust the volume as you play. If you want to add modulation effects, connect the pedal directly to your keyboard's modulation control input. When it comes to maintenance, keep the pedal in a dry and clean place. Avoid dropping it or exposing it to extreme temperatures. Since it's designed for road use, it's quite durable, but still handle it with care to ensure long - term performance.