Handheld Tachometer Digital Speedometer Battery Operated Fast Response Time
RPM at 2.5 to 999.9 RPM and RPM at 1000 to 99,999 RPM. low battery display. Resolution: 0.1RPM, at 2.5~999.9RPM; 1RPM, at 1000~99,999 RPM. Accuracy: ±0.02%+1digital. LCD display with white backlight.