Using this soap dispenser is easy. First, fill the 70.5oz soap tank from the top with any non - proprietary bulk foam soap. Then, choose your power supply, either a battery pack with 4 AA alkaline batteries or an A/C adapter. Once it's powered on, the touch - free dual sensors will activate when you place your hand below the spout. The indicator light at the base will let you know if it's powered, when it's activated, and when the soap is running low. As for maintenance, keep it clean with a soft cloth. Avoid using abrasive cleaners as they may damage the Brushed Brass PVD finish. Also, make sure to replace the batteries regularly if you're using the battery pack. And remember, this is a non - returnable item.