Sierra 18-9909 Professional Digital Voltage-Ohm Meter DVOM Sierra Professional DVOM features a state of the art ergonomic design and styling for easier handling and use. Features Full auto range features and functionality Large 4 digit LCD display with analog bargraph ACDC voltage measurement up to 600V ACDC current measurement up to 10A Tachometer function with inductive pickup measures from 30 to 20000 RPM Dwell measurement in degrees from 0 to 360 or duty cycle from 0 to 100 Includes hard she