Using this soap dispenser is easy. First, choose your preferred power supply option - you can use a battery pack or an AC adapter. If you're using the multi - station system, set it up according to your needs. Fill the 70.5oz tank with liquid soap that has a viscosity between 100 cps and 5000 cps. Just place your hand under the spout, and the touch - free infrared sensor will dispense the soap. When the indicator light shows low soap, refill the tank from the top. For maintenance, clean the spout regularly with a soft cloth to keep it looking good. Avoid using abrasive cleaners as they may damage the PVD finish. Since it has a vandal - resistant construction, it's built to last, but still handle it with care. Make sure it's installed in a place that follows ADA guidelines for easy access. And always use certified UL & CE electrical components if you're using the AC power option.