1. AUTOMATIC SOAP DISPENSER The soap dispenser with builtin sensor can automatically identify a closed hand and dispense soap liquid. The sensor distance is 23 inches. Each activation dispenses 1 ml of soap and the unit holds for 2 seconds to allow another dispensing. 2. LEAK PREVENTION / WATERPROOF Ensure the sensor screen is clean. A sealing ring is attached to both the battery box lid and the spout lid for waterproof function. The waterproof base protects the battery case from water. Uses AAA waterproof and leakproof technology to prevent circuit board corrosion by soap or water. 3. BATTERY OPERATED WITHOUT CORD Slim and compact without a cord. Open the bottom to expose the battery compartment; requires a 4x AAA battery (sold separately) and can be used for about 6 months. 4. APPLICATION The soap dispenser is powered by four batteries (not included), without restricting a power cord, making it convenient to place anywhere. Ideal for restaurants, hotels, kitchens, bathrooms, hospitals, etc.