Using this soap dispenser is easy. First, choose your power supply, either the battery pack (4xAA alkaline) or the A/C Adapter. Then, fill the 70.5oz soap tank from the top with any non - proprietary bulk foam soap. When you place your hands under the dispenser, the touch - free dual sensors will activate and dispense soap. The indicator light at the base of the spout will show you when it's powered on, when it's activated, and when the soap is running low. For maintenance, keep the dispenser clean with a soft cloth. Avoid using abrasive cleaners as they may damage the Brushed Black PVD finish. Since it has a vandal - resistant construction, it's quite durable, but be careful not to subject it to excessive force. And remember, this is a non - returnable item.