Multi-function wire finder is fast and accurate, which is built to strict quality control standards Anti-shock and anti-fall, this cable tester is suitable for various construction environments. In split design, such line finder is easy to use, made of ABS materials Automatically runs all tests and checks for Continuity, open, shorted and crossed wire pairs. Requires one 9V DC battery (Not included),Multifunction :- Automatically performs all tests and checks for continuity, open, shorted and crossed wire pairs.