【5-level range modulation temperature】Maximum reset ratio: 0, ❉, 1, 2, 3, 4, 5. Just use the modulation index arrow 0, then you can turn off the thermostat. The Thermostatic Radiator Valve has 5 temperature adjustment levels, can provide adjustment assistance, and is equipped with a liquid sensor and a zero position. 【Premium Material】The thermostat is made of premium material, with fine workmanship and good performance, which is sturdy, not easy to break and use, practical and durable. 【No Fixed Temperature Adjustment Range】The thermostatic radiator valve has no fixed temperature adjustment range and is affected by the heating temperature and room temperature. 【Antifreeze Function】The thermostatic radiator valve has antifreeze and adjustment functions, with liquid level sensor and zero adjustment, can provide adjustment assistance, can detect changes in outdoor temperature. 【Thermostatic Radiator Valve Head】The thermostatic radiator valve is suitable for M30 x 1.5 threaded