TOTO soap dispensers offer automatic, touchless operation for a more hygienic and comfortable experience. The hands-free function reduces risk for contamination, disease, and the spread of germs by dispensing soap without contact. The controller with 3 liter (.08 gallon) and 20 liter (5.3 gallon) sub-tank set are designed to connect with two chrome plated spouts. The self-adjusting sensor on the spout detects the user's hand to automatically dispense a controlled amount of foam soap. The large 20 liter sub-tank helps minimize frequent refills and helps ensure proper function of the Auto Soap Dispenser. TOTO Biodegradable, Green Seal Soap (TSFB) or Antimicrobial Soap (TSFG) is required for these dispensers. Includes controller base unit with 3 liter (0.8 gallon) reservoir, 20 liter (5.3 gallon) subtank with 16.4 ft. connection hose, two spouts, mounted hardware and supply lines. TOTO Green Seal and Antimicrobial soap sold separately.