Using this auto soap dispenser is a breeze. First, install 4 D - size batteries into the battery compartment. Then, fill the translucent tank with up to 54 oz. (1.6 L) of foam soap. Once it's all set up, just place your hand under the dispenser, and it will automatically dispense foam soap. Regarding the LEDs on the front, keep an eye on them. If the battery indicator LED lights up, it's time to replace the batteries. Also, when the soap supply level LED shows low, refill the tank promptly. To maintain this dispenser, clean the exposed chrome - plated brass surfaces regularly with a soft, damp cloth. Don't use abrasive cleaners as they may damage the finish. That's all you need to know to keep your dispenser working great!