Using this Gojo TFX touch-free automatic foam soap dispenser is easy. First, mount it on the wall following the provided instructions. Then, insert a 1200-ml refill into the dispenser. When you place your hand under the dispenser, it will automatically dispense the right amount of foam soap. Remember, the dispenser runs on three C-size batteries, which are not included, so you'll need to buy them separately. Keep an eye on the extra-large window. When it looks like the soap is running low, it's time to refill. To maintain the dispenser, clean the exterior regularly with a soft, damp cloth. Don't use abrasive cleaners as they might damage the plastic material. With proper use and maintenance, this dispenser will serve you well for a long time.