Features 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, the operation is very simple. Soil humidity control module is made of good-quality PCB material, possess high reliability.Can be used for automatic watering and sprinkling of potted plants with digital display. 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 for Small Size Aquarium, Fish Tank, Pond, Tabletop Fountains, Water Gardens and Hydroponic Systems. 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