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: 60~39,999RPM
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
10 commonly functions for rotational speed storage,
improves the efficiency of measurement. The intensity
of flashlight is increased 100% than DT2239B.
Battery: 4x1.5V AA battery