1Wide humidity measuring range and control range from 1%RH to 99%RH. 23bit LED digital tube displays the humidity clearly. 3Builtin humidity correction function. 4Robust shell design, waterproof and dustproof. 5Accurate humidity control, stable performance. Features:1.Wide humidity measuring range and control range from 1%RH to 99%RH.2.3-bit LED digital tube displays the humidity clearly.3.Built-in humidity calibration function.4.Robust shell design, waterproof and dustproof.5.Accurate humidity control, stable performance.Specification:Model: SVWL-8040Humidity measuring range: 1%-99%RHHumidity control range: 1%-99%RHMeasuring error: 0.03Power supply: AC 220VCurrent: Maximum: 200mAData retention: YesRelay contact current: AC 5A/220VOperating temperature: 0~50Storage temperature: -10~60Size: 84*80*38mm / 3.3*3.1*1.5inPackage weight: Approx. 212g/7.5ozPackage List: 1 x AirHumidity Controller with Probe