Usage Tips:Function of humidification and dehumidification / Hysteresis function Humidity correction / Delay protection Function of Upper and Lower limit / with wide humidity measuring range and controlling range Comes with a humidity controller sensor probe with cable and a temperature sensor probe with cable Humidity Measuring Range: 1% ~ 99% RH / Humidity controlling range: 1% ~ 99% RH Humidity Measuring Error: 3% Resolution: 1% RH; Sensor Type: HM-40 Power Suppler: AC 220V Current: MAX 200MA Data retention: YES Relay contact current: AC 5A/220V Temperature compensation: YES Data Retention: YES Working temperature: 0°C - 50 °C Storage temperature: -10°C - 60 °C Colour:Photo Color Material:ABS Size:about 85 x 75 x 34.5mm Package Contents: 1 x Digital Humidity Controller kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.