XH-M214 digital soil humidity moisture sensor controller for automatic watering system; 12V High quality relay onboard to control the watering system on/off based on the setting start/stop watering value; The 72x20mm soil humidity sensor detects the soil moisture displays on the 2-digit led, easily to record the current soil humidity. 20-99% RH humidity range and 1% RH accuracy, 10A control current for your choice, wide used for farm/home/factory digital irrigation. Size and connection instruction are displayed on the product pictures; Any questions, please feel free to contact us via email.