Using this foam soap dispenser is easy. First, install the 4 alkaline 'D' cell batteries in the dispenser. Then, insert the 800ml foam soap refill. Mount the dispenser on the surface as needed. When you place your hand under the spout, it will automatically dispense foam soap. Make sure to keep the dispenser clean. Wipe it with a soft cloth regularly. When the soap runs out, replace the refill. And when the batteries are low, replace them promptly for continuous operation.