Using this soap dispenser is easy. First, choose your power supply, either the battery pack with 4xAA alkaline batteries or the A/C Adapter. Then, fill the 70.5oz soap tank with non - proprietary bulk foam soap through the top - fill spout. When you place your hand 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 the power status, when it's activated, and if the soap is running low. Remember, this is a non - returnable item. To maintain it, keep it clean with a soft cloth. Avoid using abrasive cleaners as they might damage the Brushed Brass PVD finish. Since it has vandal - resistant construction, it's durable, but still handle it with care. And make sure it complies with ADA guidelines when installing it.