Sienna AutoFaucet Surround Sensor Technology (SST) with Thermostatic Mixing Valve. Kit 4 includes: spout, valve control module, thermostatic mixing valve and hot/cold supply hoses (3/8" comp x 3/8" comp. x 12" length) Contains: Thermostatic Mixing Valve, hot and cold supply lines and batteries. AutoFaucet supplied with 1.5 GPM (5.7 L/min) aerated flow.