Features [High Quality Materials]: The humidity controller is made of High Quality materials, with a sturdy casing that is water-proof and dust-proof. Safer to use, small in size and light in weight. [Stable Performance]: This thermostat and hygrostat is equipped with a high-precision temperature and humidity sensor, with accurate and stable performance. [Easy to use]: It has a three-digit LED digital tube that can clearly display the humidity. Connect the power supply to control the operation of the device by simply setting the start humidity/stop humidity. [Wide measuring range]: The humidity measurement and control range is from 1% to 99%. Accuracy: ±3%RH, the humidity controller has built-in humidity calibration to reduce measurement errors. [Wide range of uses]: It can be used in refrigerators, freezers, incubators, pet rooms, home brewing, reptiles, breeding boxes, glass containers, baking rooms, grain warehouses, computer rooms and other areas with temperature and humidity requirements. Specification: Model: SVWL-8040 Humidity measuring range: 1%-99%RH Humidity control range: 1%-99%RH Measuring error: 0.03 Current: Maximum: 200mA Data retention: Yes Operating temperature: 0~50℃ Storage temperature: -10~60℃ Size: 84*80*38mm / 3.3*3.1*1.5in Package weight: Approx. 212g/7.5oz Package List: 1 x Air Humidity Controller with Probe Package List