NOYAFA NF-8508 9-in-1 Multifunction Network Cable Tester with Wire Mapping, Tracing, OPM, VFL for Both Fiber Optic and Ethernet Network Maintenance and Troubleshooting - Quick Wire Mapping, Precision Wire Tracing with Anti-interference, Fast Port Identification, Comprehensive PoE Testing, Accurate Cable Length Measurement, Single-End Crimp Testing, High-Precision Optical Power Testing, Visual Fault Location (VFL), NCV (Non-Contact Voltage) Detection Više informacija na linku