The TOTO Libella Semi-Vessel ECOPOWER 0.35 GPM Touchless Bathroom Faucet with Thermostatic Mixing Valve, 20 Second On-Demand Flow is ideal for high-traffic spaces, providing an elegant water conservation solution. Powered by the force of running water, the ECOPOWER hydro-turbine creates an electrical current that is stored in rechargeable cells to power operation of the faucet. No external power source, wiring, or battery replacement is necessary. The ECOPOWER system is highly efficient, replenishing power stores with no minimum daily usage. The sensor is strategically positioned underneath the spout head to accurately sense the hands for touchless use. The 0.35 GPM 20 second on-demand faucet uses only 0.12 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. The included thermostatic mixing valve allows fixed water temperature adjustment and prevents scalding. Easy installation and low-cost maintenance makes this faucet practical, sustainable, and durable. The ECO CAP aerating technology balances the amount of air bubbles in the water for a comfortable experience while saving water. Included items: spout, operating controller, thermostatic mixing valve, and mounting hardware included. Purchased separately: water supply line for G 1/2 inch connection.