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 start 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. Restore factory settings: Press UP and DOWN at the same time, display 888, and automatically detect humidity. Model: Suitable for a specific brand 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: 1 * Humidity Controller Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture to differ slightly from the real thing. The measurement allowed error is +/- 1-3cm.