This auto faucet sets the standard for reliability and user-friendly performance in automated faucet systems. Surround Sensor technology gives you easy, reliable upgrades and trouble-free operation. It's a sound, long term investment, reducing water use up to 70% and delivering positive user satisfaction and health benefits. Polished chrome, 4" center set, with a 1.5 GPM aerated flow rate. Four "D" cell alkaline batteries are included. UPC low lead listed.