9V Battery Operated Continuity Tester For Diy Electrical

A: 1 continuity tester (without wire). B: 1 continuity tester + 1 red and black clip wire. This product has a built-in 9V battery, and the cover can be opened to replace the battery. --You can test whether the cable is normal, whether the wire is normal, whether the PCB board cable is normal, or whether the product is normal.