The Network Cable Tester with Optical Power Meter is an essential tool for professionals in engineering, network maintenance, and equipment setup. This advanced tester features anti-interference technology with digital/analog/POE modes, ensuring high sensitivity and minimal noise for precise cable location. The optical power meter test and port flashing function automatically detect optical fiber frequency and display port working speed on the same screen, making it easy to identify lines and ports accurately. With 9 multifunctional features, including continuity testing, cable scan, port flash, length measurement, POE power supply test, QC testing, optical power meter, VFL, and NVC functions, this tester meets all your needs. The PoE testing capability checks cable mapping polarity and voltage of PoE network switches, withstanding up to 60VDC and automatically detecting and switching between 10M/100M/1000M modes. The RJ45 cable tester quickly measures cable length up to 200m, compatible with network cables, phone lines, and BNC cables. Built-in 1500mAh 3.7V lithium power source provides up to 10 hours of operation, with Type-C charging for convenience and a flashlight for low-light environments. This versatile and reliable tester is a must-have for any professional toolkit.