The probe can be inserted directly into the soil. It is a digital display of soil moisture. When the humidity is below the set value starting pump starts watering, when humidity reaches the set value to stop watering. The operation is very simple. It is intelligent humanization. Parameters: Product name:Soil Moisture Controller Module Model: XH - M214 Power supply voltage: DC 12 V Output way: Output switch Humidity range: 20-99% RH Control precision: 1% RH Control current: 10 A Using attention: You can choose the appropriate wiring mode according to the load voltage you use 1. F0 setting start humidity(the humidity of the solenoid valve or the pump start working) Press the "SET" button to display "F0" and press the "SET" button to display the start humidity, and press +/ button to "SET" the humidity value 2. F1 setting stop humidity (the humidity of the solenoid valve or the pump stops working) Press +/- button to switch to "F1", press the "SET" button to display the stop humidity value, and press +/ button to SET the humidity value 3. F2 humidity correction Normal use without correction error.The correction of values in the use of multiple modules at the same time is conducive to a unified management operation. Colour:As shown Material:plastic Package Contents: 1 * Moisture Controller Module 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.