Display:10mm(0.4″)LCD,max,reading 99999 Range:5 to 10000 RPM,±0.05% Resolution:0.1RPM(0.5 to 1999.9RPM) 1.RPM(Over 1000RPM) Sampling Time:1 sec.for over 60 RPM Memory:Last value,max value and min value Detecting distance:50 to 150mm Power:4*1.5V,batteries,AA(UM3)size Dimension:190*72*37mm Weight:250g including batteries Quantity:20pcs Dimension:56*35.5*29cm G.W.:20.OKGS N.W.:18.0KGS