OHM Electric Digital Popular Large Rotary with Transistor Check Tester, Model, Switch, Function, TST-KJ830 (08-1288)

Operating method: double integral method Display: 3 1/2 digit digital display, maximum display "1999" Polarity display: Automatic (only the "-" sign lights up) Overrange: "1" or "-1" mark lights up Measurement functions: DC voltage/AC voltage/DC current/resistance/continuity/diode/transistor check Battery voltage display: When the battery voltage is below the operating voltage, the "battery" mark lights up