Feature: 1. The probe can be inserted directly into the soil, which bring accurate measurement 2. This 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 3. The product support intelligent operation, very simple and convenient for you to use 4. Soil humidity control module is made of good-quality PCB material, possess high reliability 5. Can be used for automatic watering and sprinkling of potted plants with digital display Specification: Item Type: Humidity Controller Module Material: PCB Purpose: Automatic watering and sprinkling for potted plants with digital display Working Voltage: DC12V Control Current: 0-20A Humidity Range: 20-99%RH Control Accuracy: ±1%RH Size: Approx. 52 x 43 x 16mm / 2 x 1.7 x 0.6in How to Use: 1. F0 set start humidity (the humidity of solenoid valve or water pump starts to work) 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 2. Set F1 to stop humidity (the humidity of solenoid valve or pump stops working) 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 3. F2 for humidity correction 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. . Package List: 1 x Module1 x Connection Line1 x Probe Note: Please follow the indicated wiring diagram. You can choose the appropriate wiring method according to the load voltage used