Using this soap dispenser is easy. First, make sure you have 4 D-Cell batteries (not included) and insert them into the battery pack. Then, install the dispenser on a countertop with a 1-inch diameter hole and at least 5 to 5-1/2 inches of clearance beneath. Next, add your commercial hand soap to the unit, which can hold 27 or 54 ounces. When you need to use soap, just place your hand under the spout, and the touch-free dispenser will release the soap. Keep an eye on the LED indicator. If it blinks red, it's time to refill the soap. For maintenance, clean the dispenser regularly with a soft, damp cloth. Avoid using abrasive cleaners as they may damage the high-polished chrome-plated plastic spout. Replace the batteries every 2 years or after 100 soap refills to ensure proper functioning.