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 until the humidity flashes, 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 until the humidity stop flashes, then press UP or DOWN to adjust the setting. Press UP and DOWN at the same time to display 888 and initiate automatic humidity detection. 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 Color: As shown Package Contents: 1 x Humidity Controller Only the above package content, other items not included. Note: Lighting and different displays may cause the color of the item to appear slightly different from the actual color. Measurement error allowed is +/- 1-3cm.