Using this soap dispenser is easy. First, choose your preferred power supply option, either the battery pack or the AC adapter. Then, fill the 70.5oz soap tank at the top with liquid soap that has a viscosity between 100 cps and 5000 cps. When you place your hand under the spout, the touch - free infrared sensor will detect it and dispense soap. Make sure to keep the dispenser away from excessive moisture to prevent damage to the electrical components. For maintenance, clean the spout regularly with a soft cloth to keep the finish looking good. Check the indicator light at the base of the spout. If it shows low soap, refill the tank promptly. Since it's vandal - resistant, it can withstand some rough handling, but avoid hitting it hard. This dispenser is designed to comply with ADA guidelines, so it's suitable for a wide range of users.