Vdomus Sensor Pump Soap and Sanitizer Dispenser Infrared Sensor Touch-free automatic soap dispenser Prevent Bacteria, Give you a healthly washing experience Instant, accurate dispensing, Maximum Capacity is 400ml ,Each Drip about 1ml Energy efficient: Lasts up to 1 year with 4 alkaline AA batteries (not included) Widely used in kitchen ,bathroom, barnershop, office, hospital and so on.