EM289 is a auxiliary tool designed for auto circuit maintenace and inspection. This tester can detect circuit polarity, voltage,connection , broke and other functions. Can be used in cars, motorcycles, bulldozers, rollers, trucks and other port maintenance operations. DESCRIPTION: Real time digitals voltage display. 6-75V DC Circuit Tester for 6V,12V,24V,48V,60V System. Circuit break, short and trace detect. Display polarity with LED, RED for Positive. GREEN for Negative. Overvoltage warning. Extended spring line about 13.12 inch. Probe protect cover. LED Digital Display. With audible reminder. SPECIFICATION: Volatage Range:6-75VDC Resolution:0.1V Accuracy:+(1+3digitals) Operating Temperature:0-50C Operating Humidity: Less than 80% Colour: A Black Material:ABS Package Contents: 1 * Car Electrical Circuit Tester Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.