Using this soap dispenser is easy. First, make sure you've installed the power supply, either the battery pack or the A/C adapter. Then, connect the soap tank to the dispenser. When you place your hand under the spout, the touch - free dual sensors will detect it and dispense soap. Be aware that this is a non - returnable item. You need to buy the soap multi - feed tank separately if you're using the multi - feed system. For maintenance, regularly check the soap level using the indicator light at the base of the spout. If the light shows low soap, refill the tank. Keep the dispenser clean by wiping it with a soft, damp cloth. Also, make sure the anti - rotational gasket/washer is in place to prevent any damage and ensure the dispenser complies with ADA guidelines.