In photoelectric mode:

Test range: 2.5～99999 R/Min

Resolution: 0.1 R/Min (2.5～9999.9 R/Min)

           1 R/Min (more than 10000 R/Min)

Measurement accuracy: ±(0.05%+1 digit)

Sampling time: 0.5 seconds (above 120rpm)

Range selection: automatic switching

Memory function: maximum value Up, value Dn, last value Last

Time base: 10.00MHz quartz crystal

Effective distance: 50～500mm

Power source: 3×3.7V lithium ion rechargeable battery (14500)

Power consumption: about 38mA

In strobe mode:

Speed adjustment range: 120~20000FPM

FPM: times/min

Coarse/fine adjustment range: <2000FPM

                      Coarse adjustment: 10FPM

                      Fine adjustment: 0.1FPM

                      ≥2000FPM

                      Coarse adjustment: 100FPM

                      Fine tuning: 1FPM

Accuracy: <0.05%

Resolution: 0.1FPM when <2000FPM

           1FPM when ≥2000FPM

Time base: 10.00MHz quartz crystal oscillator

Power supply: 3×3.7V lithium ion rechargeable battery (14500)

Power consumption: Maximum about 60mA

Dimensions: 160×74×37mm

Weight: about 180g