Using this soap dispenser is easy. First, select your power source, either the battery pack or the A/C adapter. Then, fill the 70.5oz top - fill soap 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 activate and dispense soap. Keep an eye on the indicator light at the base of the spout. It shows power status, when the dispenser is activated, and when the soap is running low. Remember, this is a non - returnable item. For maintenance, clean the dispenser regularly with a soft cloth. Since it has a vandal - resistant construction, it's durable, but still handle it with care. Make sure to follow ADA guidelines when installing it, and it's a good idea to replace the batteries regularly if you're using the battery pack.