Using your soap dispenser is easy. First, choose your power source, either the 4xAA alkaline battery pack or the A/C adapter. Then, fill the 70.5oz soap tank through the top - fill spout with liquid soap that has a viscosity between 100 cps and 5000 cps. When you place your hand near the dispenser, the infrared sensor will detect it and dispense soap. The indicator light at the base of the spout will let you know if it's powered on, when it activates, and when the soap is running low. Be aware that this is a non - returnable item. For maintenance, keep the dispenser clean with a soft cloth. Avoid using abrasive cleaners as they may damage the brushed stainless PVD finish. Since it has a vandal - resistant design, it's built to last, but still handle it with care. Make sure to follow the ADA guidelines when installing it, as it's compliant with those standards.