Using this soap dispenser is easy. First, choose your power source - either a 4xAA alkaline battery pack or an A/C adapter. Then, if you're using the Multi - Feed system, make sure to buy the “6 - SOAP - MFT” Soap Multi - Feed Tank separately. Fill it with liquid soap that has a viscosity between 100 cps and 5000 cps. Wave your hand in front of the dispenser, and the touch - free dual sensors will activate to 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, check the battery or adapter regularly. If the dispenser is in a high - traffic area, clean the sensors occasionally to ensure proper operation. The vandal - resistant design helps protect it, but avoid using sharp objects on it. And remember, this is a non - returnable item, so make sure it meets your needs before purchasing.