This is model 500483 which has been replaced by Model: RUBBI 1782742 Auto Faucet SST sets the standard for reliability and user-friendly performance in automated faucet systems with patented Surround Sensor Technology. World-Class Reliability... 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 -- trouble-free operation. Only products featuring Radius? Technology apply proprietary "smart chip" microprocessors, state-of-the-art sensors, and exclusive cam gear "dry" componentry. Radius? also incorporates proprietary non-stall technology providing the longest battery life and innovative delivery systems. Additionally, Radius? ensures breakthrough installation simplicity without the need for specialized tools or prior adaptation capability. Radius? delivers Cost Saving Reliability, Simplicity and Longevity.