Unit is inserted into soil and senses when to water the plants automatically when the soil is dry. Soil sensor measures electric current flowing between 3 metal pins on the probe and converts the signal to moisure level. Measures in 4 levels 1 being dry and 4 being wet. Operates on 2 AAA batteries (not included).
Manufacturer: GARDENA CANADA
Model Number: SPWM-8122
UPC: 066283081228
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