1.Measurement unit: meter, decimeter 2.Wheel diameter:159mm (6" ) 3Precision leveling ground: ... design, suitable for different site use, accurate measurement.Parameter description:Effective measurement:99999.9 metersMeasurement unit: meter, decimeterWheel diameter:159mm (6" ) ... ordinary measuring wheel due to the measurement of needle in the wheel center to the measurement object ( such as a wall ...