Features No need to correct errors during normal use. Using multiple modules to correct values at the same time facilitates unified management and operation. HCW-M214 digital soil moisture sensor controller for automatic watering system. 20-99% RH humidity range and 1% RH control accuracy, 10A control current for your choice, widely used in farm/home/factory digital irrigation. 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. This is a digital display of soil moisture, the probe can be directly inserted into the soil. Specification: Item Type: Moisture Controller Module Model: HCW-M214 Working Voltage: DC 12V Output Mode: Output Switch Control Current: 0-10A Humidity Range: 20-99%RH Control Accuracy: 1%RH Size: Approx. 52 x 43 x 16mm / 2.0 x 1.7 x 0.6in Package List: 1 x Controller Module 1 x Sensor 1 x Line Package List 1 x Controller Module 1 x Sensor 1 x Line