Breakthrough "surround sensor" technology (no infrared) senses user from any angle. Patented cam gear technology controls water flow and eliminates sticking solenoid valves that cause dripping. Kit 1 Contains: Spout and valve control module. Kit 2 Contains: Spout, valve control module and main supply hose (1/2" pipe x 3/8" comp x 12" length). Kit 3 Contains: Spout, valve control module, mixing valve and hot/cold supply hoses (3/8" com x 3/8" comp x 12" length). Kit 4 Contains: Spout, valve control module, thermostatic mixing valve and hot/cold supply hoses (3/8" com x 3/8" comp x 12" length). The "Touch Free" advantage eliminates a major source of cross-contamination. Encourages thorough healthy hand washing. Provides user water only when needed. Save up to 70% on water cost; Max run time 15 seconds. Sinkhole dia. 7/8" - 1 1/8".