NOYAFA NF-9816 Multi-Functional OTDR Instrument With Automatic OTDR, Expert OTDR, Event Map, 10G Split Wave Optical Power Meter - High-Precision Long-Distance Testing: Accurately diagnose fiber faults and measure performance over extended distances (up to 80 km) with a 22 20dB dynamic range, ensuring reliable network maintenance for telecom or enterprise applications Više informacija na linku