NF-8508 is a high performance network cable tester and fibre optic power meter designed for network engineers, technicians and home users. It integrates 9 functions, including cable continuity test, cable scanning, port flicker, cable length measurement, POE power test, QC crystal head test, optical power meter, NVC non-contact voltage test, the Anti-interference network cable tester is able to detect all kinds of faults in RJ45, RJ11, network cable and fibre optic cables. The Anti-interference network cable tester can comprehensively detect all kinds of faults in RJ45, RJ11, RJ11 network cables and fibre optic cables, providing one-stop solutions for network construction and maintenance. Cable scanning supports automatic detection of RJ11, RJ45, CAT5 and CAT6 cable plugs, ensuring stable connections and avoiding network interruptions due to poor contact. Home network, office network wiring: easy to detect cable connection problems, to ensure stable network connection. Optical fibre troubleshooting: locate optical fibre breakpoints, bends and other problems, widely used in optical fibre network construction and maintenance. POE device testing: check whether the POE device is working properly. Non-contact voltage test: applicable to safety inspection, industrial maintenance and home electrical inspection, help users work safely and efficiently, enterprise network maintenance, home office, smart home equipment, enterprise network maintenance, IT management and network equipment debugging, to help technicians quickly diagnose port problems and ensure network stability. Fibre optic repair, installation and commissioning tasks, especially in data centres, telcos and smart buildings. Nine integrated functions for maintenance and testing of all types of cable, fibre and network equipment Accurate cable scanning and fault location to avoid omissions and errors during troubleshooting.