The Fir Audio IEM Cable Tester helps identify any cable-related issues, regardless of the brand of in-ear monitors or type of cable you're working with. It's particularly useful for professional touring monitor engineers who need a quick and reliable way to diagnose potential faults. By using the device’s channel selector to sweep between ground and positive, you can check not only for continuity, but also for shorts. Having the ability to test cables on the spot can save valuable time and help avoid unnecessary delays while on tour.