Material: Metal Net Weight: 7g Model: FC-28 Main Color: Blue Operating Voltage: 3.3V–5V Dual Output Mode: Analog output provides higher accuracy Fixed Mounting Hole for Easy Installation Power Indicator (Red) and Digital Output Indicator (Green) Built-in LM393 Comparator Chip for Stable Performance PCB Dimensions: Approx. 3 cm × 1.5 cm Soil Probe Dimensions: Approx. 6 cm × 3 cm Cable Length: Approx. 21 cm 4-Wire Interface: VCC: 3.3V–5V GND: Ground DO: Digital Output (High/Low) AO: Analog Output Usage Instructions: This soil moisture module detects soil moisture content based on ambient humidity. When soil moisture falls below the preset threshold, the DO pin outputs a high signal; when moisture exceeds the threshold, it outputs a low signal. The digital output (DO) can be directly connected to a microcontroller for moisture detection. The DO signal can also drive compatible modules such as relays or buzzers to create a soil moisture alarm system. The analog output (AO) connects to an ADC for more precise moisture measurement. Package Includes: 1 × Soil Moisture Detection Module Note: Color may vary. Specific color requests are not accepted. Note: Due to lighting conditions and screen variations, the actual product color may differ slightly from images. Measurement tolerance: ±1–3 cm.