AC Motor Speed Controller 2000W SCR Adjustable Voltage Regulator 
Soil Moisture Sensor and Soil Detector Module Corrosion Resistance Probe for Arduino
module size :36*15*7
voltage :3.3-12VDC
current: working <20ma
      output <30ma
connect port :+ – Â DO AO
           DO :digital  output
           AO :analog output  (voltage  )
when soil humidity less than seting humidity ,DO output low level
+ :power +
– Â : Â power –
when connect power ,the power LED will ligthing ,the module start to work.
Package : 1PCS sensor probe + 1pcs module
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