This is a multi function network cable tester kit for checking on/ off state of the line, shielded network cable testing, and long distance testing.
ADVANCED LINE FINDER and Network Cable Tester Professional Maintenance Tool $17.96 - PicClick AU
RJ45 Network Cable Lan Tester RJ45 RJ11 RJ12 CAT5 UTP LAN Cable Repair Tool - AbuMaizar Dental Roots Clinic
M469D RJ45 RJ11 Network Cable Tester Telephone Line Detector (Yellow) GB
Aneng M469A Multifunctional RJ45 RJ11 Network Cable Networking Analyzer with Flashlight - Martview
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Ubersweet® M469D Network Cable Tester Pairing Instrument for RJ11 RJ45 Telephone Lines with LED Indicator, On-Off Checking/Shielded Network Cable/Long-Distance Testing Yellow : : Industrial & Scientific
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Aneng M469A Multifunctional RJ45 RJ11 Network Cable Networking Analyzer with Flashlight - Martview