The soil moisture sensor is finally released! This capacitive soil moisture sensor is different from most resistive sensors on the market. It uses the capacitive sensing principle to detect soil moisture. It avoids the problem of easy corrosion of resistive sensors and greatly extends their service life. The sensor has a built-in voltage regulator chip and supports a wide voltage range of 3.3-5.5V, which can work properly even on a 3.3V for Arduino control board. The iconic for DFRobot Gravity interface ensures compatibility and can be directly connected to the Gavity IO expansion board. Mini PCs like for Raspberry Pi only need an external ADC (analog-to-digital conversion) module to work. Connect an external screen and an for Arduino mainboard, and you can talk to your plants! See if your beloved plants are thirsty and need more water. Color: Black Material: ABS Package Contents: 1 set x Soil moisture sensor module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.