Model: XH-W3005 Moisture range:00%~99%RH Humidity control precision:0.1% RH Measuring Accuracy: +/- 2%RH Load Power: 12v 120w or 24v 240w or 220v 1500w ( depend on the one you choose ) MAX Output: 10A output type:Direct output Size:60*45*31mm Instructions : Connect to power supply , diplay Instructions humidity Set start the humidity: Pre the UP button display start the humidity , long pre about 3s the start the humidity flashing , then pre the UP or Down adjust the set Set to stop the humidity: Pre the Down button display Stop the humidity , long pre about 3s the Stop the humidity flashing , then pre the UP or Down adjust the set Restore the factory Settings: pre the UP and Down button at the same time , will display 888 then will Automatically detect the humidity Package include 1pcs Digital Humidity Controller 1pcs SHT20 Humidity sensor