Material: metal Net weight: 7g Model: -28 Main color: blue Operating voltage: 3.3V~5V; Dual output mode, more precise analog output; One screw hole for simple installation With indicator (red) and digital output indicator (green) Equipped with an LM393 comparator, stable PCB panel dimensions: approx. 3 cm x 1.5 cm Ground probe dimensions: approx. 6 cm x 3 cm Cable length: approx. 21 cm Interface description (4 wires): VCC: 3.3V-5V GND: GND DO: digital output interface (0 and 1) AO: analog output interface Usage instructions: Soil moisture module is the most sensitive for detecting moisture levels in the soil The module reaches the threshold value in soil moisture, DO port output is high, when soil moisture exceeds a set threshold value, the module output D0 is low The digital output D0 can be directly connected to a microcontroller to detect high and low soil moisture levels The digital outputs from the module's DO relay can directly drive the alarm module, forming a soil moisture alarm system AO analog output and AD module connected via AD converter, you can get more accurate moisture readings from the soil Package content: 1 x Floor Moisture Detector Module Note: Random color, not accepting the specified color. Only the above package content included, other products not included. Note: Lighting photography and different screens may cause slight color differences between the object in the image and the actual product. The allowable measurement error is +/- 1-3 cm.