Using this soap dispenser is easy. First, choose your preferred power supply: you can use a battery pack with 4xAA alkaline batteries or an A/C Adapter. Fill the 70.5oz soap tank with non - proprietary bulk foam soap through the top - fill spout. When you place your hand under the dispenser, the touch - free infrared sensor will detect it and dispense soap. To avoid false activations, make sure there are no unnecessary objects near the sensor. For maintenance, regularly check the soap level using the indicator light at the base of the spout. If the dispenser is used in a public area, its vandal - resistant construction will help protect it. Keep the spout clean with a soft cloth. This dispenser complies with ADA guidelines, so it's suitable for a wide range of users.