Specification: Item Type: Digital Humidity Controller Material: ABS Use: Storage warehouses, greenhouses, homes to check humidity at all times Working Voltage: 110-220V Control Range: 0%-99%RH Output Type: Direct output Control Accuracy: 0.1%RH Measurement Accuracy: 0.2%RH Input Type: SFG309T Maximum Capacity: Maximum 10A Instructions for Use: Set Starting Humidity: Press the up button once to display the starting humidity, press and hold the up button for 3 seconds, the starting humidity number flashes, set the desired humidity value through the up and down buttons Set Stop Humidity: Press the down button once to display the stop humidity, press and hold the button for 3 seconds, the stop humidity number flashes, set the desired humidity value through the up and down keys How to Restore the Factory Settings: When the power is on, press the up and down keys at the same time, the digital tube will display 888 and then automatically skip to detect the humidity, that is, restore the factory settings Package List: 1 x Digital Humidity Controller