Using this soap dispenser is easy. First, if you're using the Multi - Feed system, make sure you've bought the “6 - SOAP - MFT” Soap Multi - Feed Tank separately and installed it correctly. Fill the tank with liquid soap that has a viscosity between 100 cps and 5000 cps. When you place your hand under the spout, the touch - free dual sensors will detect it and dispense soap. If you prefer a Single Fill System, look for the right part number with a “T”. As for power, you can choose either a Battery pack (4xAA alkaline) or an A/C Adapter. Keep an eye on the indicator light at the spout base. It will tell you if there's power, when the dispenser is activated, and when the soap is running low. For maintenance, clean the dispenser regularly with a soft cloth. Make sure the anti - rotational gasket/washer stays in place to keep the vandal - resistant feature working. And remember, this is a non - returnable item.