Network Cable Tester NF-8209S is a multifunction tool for testing, tracing, and measuring Ethernet cables. Supports CAT5/CAT6 UTP and STP. Tests wiremap for open, short, cross, and correct pair. Measures cable length and fault distance up to 200 m. Detects PoE voltage (5–60 V), powered pins, and identifies standard or non-standard PoE. Includes port flashing for locating switch ports and NCV detection for 70–1000 V AC. Two scan modes: normal and anti-interference. LCD backlit display. Powered by 3.7 V 1400 mAh Li-ion battery with Type-C charging. Signal output 5 V ± 1 Vp-p at 455 kHz. Range up to 600 m. Main unit size 130×70×28 mm.