Connect to power supply to display humidity instructions. Set start humidity: Press the UP button to display start humidity. Long press for about 3 seconds until the start humidity value flashes, then press 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 stop humidity value flashes, then press UP or DOWN to adjust the setting. Restore factory settings: Press and hold the UP and DOWN buttons simultaneously. The display will show 888, then automatically detect humidity. Note: Actual color may vary slightly from the image due to different monitor settings and lighting effects. Allow 1-3 cm deviation due to manual measurement. Specifications: Display Type: Digital Usage: Household Model Number: XH-W3005 Style: Embedded Max Measuring Temperature: 49C and under Theory: Humidity sensor Range: 099% RH Humidity control precision: 0.1% RH Measuring Accuracy: 2% RH Moisture range: 099% RH Max Output: 10A Output type: Direct output Color: White Voltage: High pressure - AC220V Material: ABS Size: 60 x 45 x 31 mm Package Contents: Option 1: 1 x Digital Humidity Controller 1 x Humidity Sensor 1 x Probe Wire Option 2: 1 x Digital Humidity Controller 1 x Humidity Sensor