1.Measurement unit: meter, decimeter 2.Wheel diameter:159mm (6" ) 3Precision leveling ground: + 0.5% ... advantages of convenient use, two molding rubber non-slip wheel design, suitable for different site use, accurate measurement. ... Parameter description:Effective measurement:99999.9 metersMeasurement unit: meter, decimeterWheel diameter:159mm (6" )Precision leveling ground: ...