The TOTO(R) AC Powered 0.5 GPM 10 Second On-Demand Water Supply Heater and Controller for Touchless Spouts is designed for use with compatible TOTO spouts. This integrated hot water system and touchless faucet controller allows you to consolidate faucet devices into one unit. Power saving features find a time when hot water usage is low and saves energy. The 0.5 GPM 10 second on-demand controller uses only 0.08 gallons per cycle and is CEC and CALGreen compliant. The on-demand system means that water flows only when needed and cannot be accidentally left running. When hands are present, the water will flow, and when hands are removed, the water will stop. Included: controller and mounting hardware. Purchased separately: compatible spout, water supply line for G1/2 connection