* Humidity & dryness can be tested and displayed automatically through adjusting switch manually.
* Insert the vavle into the soil. Turn dryness switch to set the dryness to 20%, 35%,50%, The vavle will automatically start watering when the soil dryness reach 20%, 35% , 50%. Turn humidity switch to set the humidity to 65%, 80%, 95%. The vavle will automatically stop watering when the soil humidity reach 65%, 80%, 95%.