Feature: Model: XH-W3005Moisture range:00%~99%RHHumidity control precision:0.1% RHMeasuring Accuracy: +/- 2%RHLoad Power:12v 120w or 24v 240w or 220v 1500w ( depend on the one you choose )MAX Output: 10AOutput type:Direct outputSize:60*45*31mm Instructions : Connect to power supply , diplay Instructionshumidity .Set start the humidity:Press the UP button display start the humidity , long press about 3s thestart the humidity flashing , then press theUP orDown adjust theset.Set to stop the humidity: Press the Down button display Stop the humidity , long press about 3s the Stop the humidity flashing , then press theUP orDown adjust theset . Restore the factory Settings:press theUP and Down button at the same time , will display 888 then will Automatically detect the humidity.