Specifications:
Display:                                    5-digit LCD, height of digit: 18mm
Measuring range:                     2.5-99999 RPM
Resolution:                               0.1RPM（2.5～999.9RPM), 1RPM(over 1000RPM)
Accuracy:                                  ±（0.05%+1character）
Responding time:                     0.5 second（over 120RPM）
Measuring range choise:          Automatic
Effective distance：                  50mm - 500mm
MAX current：                           40mA
Data record：                           automatically record Max.,Min. & final measurement results
Time base：                              6MHz quartz crystal
Time base accuracy：               10X10-6(0℃～50℃)
Battery:                                    4.5V (3 cell) AAA battery
Dimension:                               184X76X30mm