The TOTO ZN 1.1 GPM Electronic Touchless Bathroom Faucet Controller with Safety Thermo Thermostatic Mixing Valve is designed for use with the ZN Touchless Bathroom Spout to modulate water flow through the faucet. The controller uses TOTO's Safety Thermo(TM) thermostatic mixing valve, which enables quick, responsive scald prevention. The WaterSense certified 1.1 GPM flow rate saves water without diminishing the performance of the faucet. The controller requires an AC 100 - 240 volt outlet within reach of the 2.5 foot power cord. Check local plumbing code for specification requirements. TOTO ZN spout TLP01701U sold separately.