Using this soap dispenser is easy. First, choose your preferred power supply, either the battery pack or the A/C Adapter. Then, fill the 70.5oz soap tank through the top - fill opening with any non - proprietary bulk foam soap. When you place your hands under the dispenser, the touch - free dual sensors will detect and dispense soap. The indicator light at the base of the spout will show if it has power, if it's activated, and when the soap is running low. Remember, 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 Brass PVD finish. Also, since it has a vandal - resistant construction, it's built to last, but still handle it with care. Make sure it complies with ADA guidelines when installing it in a public or accessible area.