【Wide Application】The circuit tester light with DC low voltage test range of 3-100mA. 36V, designed for testing various vehicle electrical circuits, such as car headlights, tail lights, turn signal circuits, faulty connectors, fuse terminals, etc. Also useful for testing other 3-36V wiring and circuits. In addition, it also can judge the plus or minus of the battery. through the red and green LED indicators. 【Clear Digital Display and LED Indicators】The circuit light tester with very clear LCD display, 100% resolution. 1V voltage reading with an accuracy of ± 0.2V. In addition, when judging the polarity When the power is turned on, the two LED indicators light up in different colors to make judgments. 【Touch Switch】【3 Positions】The circuit light tester with a toggle switch. 3 positions. The 3 gears are stopped, the positive and negative poles of the battery are judged, and the voltage is tested. When judging the positive and negative poles of the battery, the red light indicates that