Features: The Networks Cable Tester delivers precise cable tracing and fault detection for CAT5/CAT6/shield cables, featuring an anti interferences design and probe to locate wires in wall, ceilings, or cable bundles. Equipped with LED sequences indicators, and polarity testing for phone lines, this multifunctional wire tracers ensures safe operate while checking continuity, shorts, or RJ45 crimping errors via visual feedbacks. Ideal for electricians, networks technicians, and maintenance professional requiring cable verification during installations, troubleshooting, or facility upgrades. Perfect for tracing hidden wires under carpets, diagnosing office networks issues, or inspecting structure cabling systems in commercial buildings and industrial environments. Its ergonomic design includes auto shutdown after 30 minutes, battery levels alerts, and a built in worklight for low light conditions, combining efficiency with user friendly operate for seamless electrical diagnostics. Specifications: Component: Plastic Cable Pairing Check (Wiremap): YES Flashlight: YES NCV: YES Power supply: 9V battery (Cable tracers) 3.7V battery (receiver) Size: about. 20cm/7.87in Package Includes: 1 Set Cable Tracers note: Please allow 1-2cm errors due to manual measurement. Due to difference between different monitors, the picture may not reflect the item actual color.