... 2.Measuring tach , 3.Vibratilite frequency by noncontact, 4.Low power consumption, TachometerSTROBOSCOPE1.Large screen,2.Measuring tach ... adjust the flash frequency and low power consumption.Display:4 digits LCD display with backlightMeasuring range:60~19,999RPMAccuracy:±0.05% ... Power:4×1.5V AA batteryPower consumption:approx. ...