Description: Ideal for monitoring soil moisture. When the soil appears w ater supply shortage, the relay module will be broken, andconversely the relay module will be closed. Adjustablesensitivity LM393 Chip, High Stability Indicator light: Red one for power, Green one for relay switch Working Voltage: 12V PCB Size (L x W x H): Approx. 4.7cm x 2.5cm x 1.7cm Sesor Size(L x W): Approx. 6cm x 2cm Cable Length: Approx. 20cm Package Includes: 1 xSoil Humidity Relay Module
