Otto’s sleek profile, high-gloss finish, and chrome accents look great in any kitchen or bathroom. The innovative sensor pump technology automatically dispenses a fixed amount of liquid soap – not too much, not too little – helping reduce waste and saving you money on supply costs. Otto’s fluid level indicator window lets you see when it’s time to refill and the large, top-load refill opening makes topping it up quick and easy. Operating on four AAA batteries (not included), Otto measures 3.5 x 4.5 x 10 inches (8.89 x 10.16 x 25.4 cm). Otto Automatic Soap Pump is not recommended for use with foaming hand soaps. U.S. Patent No. D682,589