Description: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 ligent humanization. Precautions:Please follow the wiring diagram for the instructions. You can choose the appropriate wiring method according to the load voltage used. 1.F0 sets the starting humidity (the humidity of the solenoid valve or pump starts to work) Pre the "SET" button to display "F0" and pre the "SET" button to display the starting humidity. Pre the + / button to "set" the humidity value. 2.F1 sets the stop humidity (the solenoid valve or pump humidity stops working) Pre +/- to switch to "F1", pre "SET" to display the stop humidity value, pre + / to set the humidity value. 3.F2 humidity correction There is no need to correct the error during normal use. Simultaneous use of multiple modules to correct values facilitates unified management operations. 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 Colour:Blue Material:PCB Size:52*43*16mm Package Contents:1 x XH-M214 Humidity Controller Soil Sensor Module Only the above package content, other products are not included. Note:Light shooting 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.