Soap dispensing volume can be adjusted to 0.8 mL, 1.2 mL, 1.6 mL, or 2.0 mL;54 oz. (1600 ml) high capacity soap reservoir;Optional 27 oz. (800 ml) low-capacity soap reservoir (sold separately);Sensor range adjustable from 1" to 4" (25.4 to 101.6 mm). Default set at approximately 2-3/4" (69.5 mm);Maintenance/cleaning mode is activated for 30 seconds when sensor is blocked for 10 seconds;Vandal-resistant sensor delays dispensing for twenty seconds if activated 4 times in under 5 seconds;Low soap and low battery above-the-counter indicators;Easy below-the-counter refill;Battery-operated (4 "D" batteries supplied);Requires low (1-20 cps or gr/m-s) viscosity foam soap with no suspended particles. Please see Installation Guide or Maintenance and Use Guide for specific soap recommendations;Kohler Soap (sold separately) recommended for optimized performance and longevity