Item Type: Humidity Controller Module_x000D_Material: PCB_x000D_Purpose: Automatic watering and sprinkling for potted plants with digital display_x000D_Working Voltage: DC12V_x000D_Control Current: 0-20A_x000D_Humidity Range: 20-99%RH_x000D_Control Accuracy: 1%RH_x000D_Size: Approx. 52 x 43 x 16mm / 2 x 1.7 x 0.6in_x000D_How to Use:_x000D_1. F0 set start humidity (the humidity of solenoid valve or water pump starts to work)_x000D_Press the "SET" button to display "F0" and press the "SET" button to display the starting humidity, press the + / - button to "set" the humidity value_x000D_2. Set F1 to stop humidity (the humidity of solenoid valve or pump stops working)_x000D_Press the +/- key to switch to "F1", press the "SET" key to display the stop humidity value, press the + / - key to set the humidity value_x000D_3. F2 for humidity correction_x000D_There is no need to correct errors during normal use. Using multiple modules to correct the values at the same time is conducive to unified management operations. 1The probe can be inserted directly into the soil, which bring accurate measurement 2This is a digital display of soil moisture. When the humidity is lower than the set value, start the pump to start watering, and stop watering when the humidity reaches the set value 3The product support intelligent operation, very simple and convenient for you to use 4Soil humidity control module is made of good-quality PCB material, possess high reliability 5Can be used for automatic watering and sprinkling of potted plants with digital display 1 x Module 1 x Connection Line 1 x Probe