TOTO(R) 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 3 liter (.08 gallon) reservoir and controller is designed to connect with one chrome plated spout. The self-adjusting sensor on the spout detects the user's hand to automatically dispense a controlled amount of foam soap. TOTO Biodegradable, Green Seal(TM) Soap (TSFB) or Antimicrobial Soap (TSFG) is required for proper functionality. Includes controller base unit with 3 liter (0.8 gallon) reservoir, one chrome plated spout, mounted hardware and supply lines. TOTO Green Seal(TM) and Antimicrobial soap sold separately.