PEAKMETER Digital Tachometer Handheld Motor Tachometer LCD N8P8
Support 50RPM --- 19999RPM speed display with an accuracy of ± (0.03% + 2d). Speed integrated chip. Support m/min, m/sec, ft/min, ft/sec, in/min unit selection. Auto Off: 30S. 19 11 6cm / 7.5 4.4 2.4in.