The TOTO Libella Semi-Vessel ECOPOWER or AC 0.5 GPM Touchless Bathroom Faucet Spout, 20 Second Continuous Flow is ideal for high-traffic spaces, providing an elegant water conservation solution. The sensor is strategically positioned underneath the spout head to accurately sense the hands for touchless use. The 0.5 GPM 20 second continuous flow faucet uses only 0.17 gallons per cycle and is CEC and CALGreen compliant. The water will flow continuously for 20 seconds, preventing water waste from the faucet being left running. The ECO CAP aerating technology balances the amount of air bubbles in the water for a comfortable experience while saving water. The spout works with your selection of compatible TOTO ECOPOWER or AC controller systems. Included items: spout only. Purchased separately: Compatible TOTO ECOPOWER or AC operating controller, water supply line for G 1/2 inch connection, and optional mixing valve