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Network Cable Tester - NCT-2
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Amazon.com: Yankok [Network and USB Cable Tester] for RJ45 RJ12 RJ11 Ethernet, USB (AA, AB), Coaxial BNC RCA,10BASE-T 100BASE-T, EIA/TIA 568A/568B and Token Ring Cables (Come with User Manual and Carry Pouch) :
Lanberg NT-0403 RJ45/RJ11/USB Cable Tester Blue | Techinn