Specifications: LED Display: Red or Blue (random delivery) Moisture range: 00%99% RH Humidity control precision: 0.1% RH Measuring accuracy: 2% RH Load power: 110V220V Max output: 10A Output type: Direct output Instructions: Set start humidity: Press the UP button to display start humidity. Long press for about 3 seconds until the value flashes, then use UP or DOWN to adjust the setting. Set stop humidity: Press the DOWN button to display stop humidity. Long press for about 3 seconds until the value flashes, then use UP or DOWN to adjust the setting. Restore factory settings: Press and hold UP and DOWN buttons simultaneously. The display will show 888, then automatically detect humidity.Package includes: 1 x Digital Humidity Controller 1 x Humidity Sensor