DM9031 Automotive Engine TachometerDetailed product description：

DM9031 Automotive Engine Tachometer

Engine RPM: 100~9999RPM ± 1%
AC/DC voltage: 0~600V ± 0.8%
AC/DC current: 0~10A ± 1.5%
Resistance: 0-20M Ohm ± 0.8%
Platinum closed angle, temperature, frequency and other measurement functions
Recordable maximum value, minimum value, and read value locking function
RS-232 output interface (software selection)
Size：204 X 90 X 36mm