The new multifunctional electric tester makes up for the various shortcomings of the existing car maintenance electric tester. It integrates functions such as voltage measurement, bulbs measurement, load voltage measurement with bulbs, pulse signal measurement, load equipment measurement, power supplys polarity display and other functions. If you are interested in this product, come and have a try, it will not let you down. Features: Positive&Negative Identification: In the measurement, the red and green light-emitting diodes are used to distinguish the positive and negative polarity of the measurement power supplys, which is intuitive and fast. Bulbs Measurement: Using a 5W car bulbs as a load, it can quickly determine the power supplys failure of the line. Compared with a diode tester, it can find some invisible failures of poor contact and virtual voltage. Load Voltage Measurement with Bulbs: By measuring the brightness and dark of the electric pen bulbs, the line voltage fault can only be roughly judged. With the voltmeter function of the electric pen, more accurate measurement can be achieved, thereby improving the fault diagnosis. Pulse signals such as Hall sensor, ignition pulse, fuel injectors pulse, etc. can be measured conveniently and quickly through the diode of the electrometer. For the load plug, you can use the probe attached to the clip, combined with the probe of the electric test pen, to directly measure, which is convenient for fault diagnosis. Three Modes Switch: The mode 1 is LED digital display and bulbs work at the same time, the mode 2 is LED digital display works, the bulbs does not work, the mode 3 is LED digital display does not work, the bulbs works normally. Jump Function: insert the main and auxiliary probes into the two jacks to be bridged (closer distance), such as relay Sockets, ignition switch plugs, etc., and then the two probes can be cross-contacted. Torch Lighting Function: When inspecting and repairing in the dark place in the instrument panel, the positive anode can be clamped by the clip, and the probe pen touchs the instrument panel the metal inside is grounded, and the light after the pen is lit can be illuminated. Specifications: Material: ABS+metal Working voltage ranges: 5V~30V Check whether the battery is leaking: Check whether the fuse is blown: Detect the LAN local area network circuit: Distinguish between real electricity, virtualelectricity, series electricity and poor grounding: Package size: 100 * 60 * 60mm / 3.9 * 2.4 * 2.4in Package weight: 66g / 2.3ounce Packing list: 1 * Test Tool with probes 1 * User Manual