Features 【High-quality material】: The humidity controller is made of high-quality material, the casing is sturdy, waterproof and dustproof. Safer to use, small size and light weight. 【Large measurement 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. 【Easy to use】: It has a three-digit LED digital tube, which can clearly display the humidity. Connect the power to control the operation of the device by simply setting the start humidity/stop humidity. 【Stable performance】: The constant temperature and humidity device is equipped with a high-precision temperature and humidity sensor, and the performance is accurate and stable. 【Wide range of uses】: It can be used in refrigerators, freezers, incubators, pet rooms, home brewing, reptiles, breeding boxes, glass containers, roasting rooms, grain depots, computer rooms and other fields with temperature and humidity requirements. Description: 1、The air humidity controller with wide humidity measuring range and control range from 1%RH to 99%RH. 2、3-bit LED digital tube displays the humidity clearly. 3、Accurate humidity control, stable performance. 4、Built-in humidity calibration function. 5、This digital humidity controller adopts robust shell design, waterproof and dustproof. Specification: Model: SVWL-8040 Humidity measuring range: 1%-99%RH Humidity control range: 1%-99%RH Measuring error: 0.03 Power supply: AC 220V Current: Max. 200mA Data retention: Yes Relay contact current: AC 5A/220V 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 * Humidity Controller 1 * Temperature Sensor Probe with Cable Package List