This hands free soap dispenser earned The Best rating from the Hammacher Schlemmer Institute because it dispenses adjustable amounts and was the easiest use. Unlike lesser models that only dispensed one amount, The Best model allows users to select from three amounts of soap to ensure the preferred amount is dispensed. The Best model's infrared sensor triggers the soap to dispense as soon as hands are under the spout and it did not drip after dispensing. Unlike lesser models that were difficult to open and only held 6 oz. of soap, The Best Hands Free Soap Dispenser's lid opens with the touch of a button and its large reservoir holds 13 1/2 oz. of soap. Requires four AA batteries. 8 1/2" H x 7" D. (12 oz.)