The FieldScout TDR250 Soil Moisture Meter is the most economic option that measures Soil Moisture (VWC - Volumetric Water Content) and Surface Temperature. The backlit display allows for easy reading even in the early morning hours. TDR rods are sold separately and are REQUIRED. Choose from 1.5" (3.8cm), 3" (7/6cm), 4.8" (12.2cm) and 8" (20cm) rods to match your needs. Data can be collected with a USB flash drive. (Case is NOT included)