It is used the microcomputer(CPU) technique,photoelectrical technique and LCD for one combine PHOTO TACH&MOTION&SURFACE MAR.

Product Name:DT2239B Handheld Stroboscope(60-19,999RPM)
This tachometer is used the microcomputer (CPU) technique, photoelectrical technique and LCD for one instrument combine PHOTO TACH & MOTION & SURFACE MAR.
Large LCD display with backlight
Digital control adjust flash frequence
Low power consumption
Measure range: 60~19,999RPM
Coarse/Fine adjust amplitude:
<1,000RPM Coarse adjust: ±10RPM
Fine adjust: ±0.1RPM
≥1,000RPM Coarse adjust:±100RPM
Fine adjust: ±1RPM
Accuracy: ±0.05%
Resolution: <1,000RPM: 0.1RPM
≥1,000RPM: 1RPM
Battery: 4x1.5V AA battery