Leak prevention and waterproof design: keep the sensor screen clean; sealing rings on both the battery box lid and the spout lid deliver a robust waterproof function; the waterproof base protects the battery compartment from water; uses AAA waterproof and leakproof technology to prevent soap or water from reaching the circuit board. Automatic soap dispenser: builtin sensor automatically detects a closed hand and dispenses soap. Sensor range is 2–3 inches. Each activation releases 1 ml of soap and uses a 2second dwell time before the next dispense. Cordless, batterypowered operation: slim and compact, no cord. Open the bottom to access the battery compartment; requires 4x AAA batteries (sold separately) and can be used for about 6 months. Applications: powered by four batteries (not included) with no power cord restrictions, allowing placement anywhere. Ideal for restaurants, hotels, kitchens, bathrooms, hospitals, and similar settings.