Using this soap dispenser is easy. First, choose your power supply, either the battery pack or the A/C adapter. Then, fill the 70.5oz tank at the top with non - proprietary bulk foam soap. When you put your hands under the dispenser, the touch - free dual sensors will detect them and dispense soap. Keep an eye on the indicator light at the base of the spout. It will show if the dispenser is powered, when it's activated, and when the soap is running low. Remember, this is a non - returnable item. To maintain it, clean the exterior regularly with a soft cloth. Avoid using abrasive cleaners that could damage the Brushed SS finish. The dispenser is vandal - resistant, but still, try to keep it in a safe place. And it complies with ADA guidelines, so use it with confidence knowing it meets accessibility standards.