Connect the power, display the humidity indicator Set the initial humidity: Press the UP key to display the initial humidity, press and hold for about 3 seconds to the humidity flashing, and then press UP or DOWN to adjust the setting. Set the humidity stop: Press the down key to display the humidity stop, press and hold for about 3 seconds to stop the humidity flashing, and then press UP or DOWN to adjust the setting. : Press UP and DOWN at the same time, display 888, and automatically detect humidity. Model: XH-W3005 Humidity range: 00 percent -99 percent RH Humidity control accuracy: 0.1 percent RH Measurement accuracy: 2 percent RH Load power: AC 110-220V 1500w Maximum output: 10A output type: direct output Size: 60x45x31mm Material:Metal and Plastic colour:As Shown Package Contents: 1 x Humidity Controller Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real . The measurement allowed error is 1-3cm. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.