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Toolbox for electrical & network engineers:. Equip yourself with the versatile NF-B509 – one gadget to diagnose network and electrical components. Swiftly run continuity checks for RJ45 UTP/STP network cables. identifying wiring issues within seconds. Effortlessly trace the location of a network cable using a probe and tone generator. making cable identification across different rooms a breeze. Measure RJ45 cables easily. eliminating manual measurements and saving valuable time. Connect and test ethernet status with detailed on-screen information. including voltage providers and standards. Locate a port connected with a cable in a router or other ethernet switch. Easily spot the target via a flashing light. Connect the tester pins to unveil MF-B509's digital multimeter capabilities. Test the voltage and current (AC/DC) directly. Run electric diagnostics easily and fast.