Specifications:LED Display: Red Light or Blue Light, random deliveryMoisture range:00%~99%RHHumidity control precision:0.1% RHMeasuring Accuracy: +/- 2%RHLoad Power: 110V~220VMAX Output: 10AOutput type:Direct outputInstructions :Set start the humidity: Press the UP button display start the humidity , long press about 3s the start the humidity flashing , then press the UP or Down adjust the setSet to stop the humidity: Press the Down button display Stop the humidity , long press about 3s the Stop the humidity flashing , then press the UP or Down adjust the setRestore the factory Settings: press the UP and Down button at the same time , will display 888 then will Automatically detect the humidityPackage include:1 x Digital Humidity Controller1 x Humidity sensor