【Application】Automotive circuit repair digital indicator pens are widely used in trailers, trucks, RVs, motorcycles, airplanes, snowmobiles, etc. 【Supports various 【Tests】Automotive circuit repair tools Multifunctional test pens support short circuit and open circuit tests, ignition system tests, engine performance tests, load tests, battery tests and polarity detection tests. 【Fast and accurate】The high-precision digital LCD display helps workshop technicians quickly diagnose vehicle problems and greatly improve work efficiency. It can quickly and accurately detect various line faults without damaging the rubber coating.