Model  No  Quantity  1  Color  Blue  Material  PCB  Specification  Voltage: 5V; Can be used to monitor various weather， with relay， output directly， can control power on / off of electric motor  Features  Sensor is made of quality dual-side FR-04， size: 5.0 x 4.0cm; Treated w/ plated nickel， anti-oxidant， conductive and better life; Control load directly w/ relay; Can adjust sensitivity matching w/ potentiometer to control relay start at different moistures  Application  Connected to power， indicator light on; Relay's indicator won't light on if there is no water drop on the sensor board， and it will light on if there is a drop of water  Other  A product for arduino that works with official Arduino boards.  English Manual/Spec  Yes  Packing List  1 x Sensor module     1 x Relay board     2 x Dupont line (20cm)<img src="http://112.74.112.28/down/products/204786/204786_000.jpg" noproxy>