1. High-precision digital display detection,Real-time display of voltage values, accurate to 0.1V, wide range testing of DC 5-32V, clear and intuitive digital screen, quickly determine the on-off of automotive circuits and abnormal voltage problems. 2. Indicator light auxiliary diagnosis: Equipped with LED indicator lights, it is easy to identify the polarity of the circuit without any experience, avoiding the risk of incorrect connection. 3. Professional brass probe design: The hardened brass needle tip can Pierce the insulation layer to detect concealed circuits. Combined with the spring wire telescopic structure, it can easily reach narrow or deep circuit nodes. 4. vehicle materials: Impact- ABS shell + anti-rust brass components, stable operation in extreme environments ranging from -20℃ to 80℃, shockproof and oil-proof, suitable for the complex environment of automotive engine compartments. 5. Compatibility with all vehicle models, It is suitable for 12V/24V vehicle systems and is universal for cars, trucks, recreational vehicles, ships and motorcycles. It is an essential tool for circuit maintenance, modification and troubleshooting. Dimensions: 30.6x2x1cm Weight: Approximately 35g Measurement range: DC5-32V The numbers show: Yes Indicator light: With positive and negative pole indicator lights Color: Black Material: Metal+Plastic Package Contents: 1 * Circuit test pen 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.