Using this soap dispenser is easy. First, select your power source, either the battery pack with 4xAA alkaline batteries or the A/C Adapter. Then, fill the 70.5oz top - fill soap tank with liquid soap having a viscosity between 100 cps and 5000 cps. When you place your hand under the dispenser, the touch - free dual sensor will detect it and dispense soap. The indicator light at the base of the spout will let you know if there's power, when it's activated, and when the soap is running low. As for maintenance, keep the dispenser clean with a soft cloth. Since it has a vandal - resistant design, it's quite durable, but still handle it gently. Also, make sure to follow the ADA guidelines when installing it. The electrical components are UL and CE certified, so you don't have to worry too much about electrical safety.