The touch-free delivery eliminates cross-contamination to help reduce the spread of germs and encourages use. Dispense foam automatically when your hand is detected by the dispense. Put the battery into the battery compartment, pay attention to the positive and negative directions, and make sure the battery cover is closed. Under normal circumstances, there is no need to shut down, and the machine automatically enters standby mode. Touch less and cleaner, relieve your hands from the original manual soap dispenser. It is recommended to use a set of 3 batteries of the same brand. The waterproof base helps to extend the life of the soap dispensers.