Specifications:
Display:                                  5-digit LCD, height of digit: 16mm
Measuring range:                2.5-99999 RPM
Resolution:                           0.1RPM（2.5～99999RPM), 1RPM(over 1000RPM)
Accuracy:                               ±（0.05%+1character）
Measuring range choise:     Automatic
Effective distance：              50mm - 300mm
Data record：                        automatically record Max.,Min. & final measurement results
Battery:                                     4.5V (3 cell) AAA battery
Dimension:                            150X70X30mm
Weight:                                   220g