[Intelligent network cable tester] Uses advanced digital demodulation to realize anti-interference and noise-free ethernet cable tester and wire tracker, functions of wiremap, cable tracer, crimping, and port flash. Apply to polarity recognition test of the telephone line, standby, off-hook, ringing, and LED indicator in different states. [Find line faults] Track and locate R45 and RJ11 cables. This network line tracker use TIP or PING lines to determine whether the phone line is free, ringing, or off-hook. [Rich in functions & easy to use]The line finder with NCV function can detect the presence of AC voltage (40V-1000v). The network toner also has lighting and earphone functions to ensure that you can use the product in various environments and avoid external interference. [Friendly Design] Handheld network tester, multi-function cable tester. When the battery power is lower than the power required for the normal operation of the instrument, the Power indicator flashes. [Wide application field& Customer Support] The lan wire tester can be used for daily network communication maintenance, integrated wiring network engineering, and metal wireline engineering and maintenance. And we have a professional and friendly after-sales team. If you have questions, please contact us directly.