Connect the power, display the humidity indicator Set the initial humidity: the UP key to display the initial humidity, and hold for about 3 seconds to start the humidity flashing, and then UP or DOWN to adjust the setting. Set the humidity stop: the down key to display the humidity stop, and hold for about 3 seconds to stop the humidity flashing, and then UP or DOWN to adjust the setting. Restore factory settings: UP and DOWN at the same time, display 888, and automatically detect humidity. Model: XH-W3005 Humidity range: 00%~99%RH Humidity control accuracy: 0.1% RH Measurement accuracy: +/- 2% RH Load power: AC 110-220V 1500w Maximum output: 10A output type: direct output Size: 60x45x31mm Material:Metal + Plastic colour:As Shown Package Contents: 4 x Humidity Controller Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.