5-Stage Temperature Control: The thermostat has 5 adjustable stages, allowing you to adjust the temperature according to your needs. 0 is off, 1-5 intensity in ascending order. When you need to ventilate for a long time and go out, you can adjust to the lowest speed "*". High-Quality Materials: The thermostatic valve body is made of high-quality forged and machined brass with a nickel-plated exterior as well as plastic. Fine workmanship, excellent adjustment properties, very durable and long service life. Constant and Adjustable Temperature: The thermostat has no fixed temperature setting and is equipped with a level probe and a zero level to detect changes in the outdoor temperature, with anti-freeze and temperature adjustment functions. Easy to Use: To assemble, align the scale with "5", then screw in the coupling nut and tighten it. When installing, note that the water flow arrow points in the same direction as the water flow. Both vertical and horizontal installation are