The KOHLER hybrid energy system is a first-of-its kind 30-year power solution for touchless faucets. When combined with Insight Technology, this system provides an environmentally-friendly, virtually maintenance-free electronic faucet. Powered by the 30-year hybrid energy system. Required for Purist® and Falling Water® wall-mount Touchless faucets. 0.5 gal/min (1.9 l/min) flow rate. 30 second maximum cycle time. Ideal for use with KOHLER Vessels. Low-lead (SDWA) compliant Adjustable sensor/spout distance. Brass construction.