Features: 1. Special test pencil for automobiles, also suitable for trailers, van, RVs, motorcycles, airplanes, and snowmobiles 2. Test the short circuit and open circuit of the car circuit. Circuit polarity discrimination test 3. Car battery performance test, charging system performance test, ignition system performance test, engine performance test 4. Diode light, long time use is not easy to heat, not easy to damage, safe to use 5. The design of the metal clip can be used to fix it at the detection position during continuous detection, freeing hands Notice: 1. Actual color may be slightly different from the image due to different monitor and light effect. Please allow 1-3cm deviation due to manual measurement. Specification: Material: metal + rubber Color: yellow Scope of application: 6V12V24V Size: Test pen length:110mm Cable length:1m includes: 1 x test pencil