Staring at a tangled mess of cables and need to find ONE specific wire? This NF-268 tracer and tester is your new best friend. It's a two-piece kit (emitter and receiver) that helps you identify, trace, and test network (RJ45), telephone (RJ11), and coaxial (BNC) cables – even when they're connected to a live switch, router, or PC! No more unplugging everything. Here's how it works: you connect the emitter to the cable you want to trace (using the included RJ45, RJ11, or alligator clip cables). It sends a tone signal down the wire. Then, you use the handheld receiver (which has a bright LED and audible beep) to scan the cable bundle. The cable carrying the signal will cause the receiver to beep loudest and the LED to shine brightest. Boom – target found! It also functions as a basic cable tester, checking for opens, shorts, and crossed wires on 2/4-wire telephone and LAN cables. It can even detect DC voltage, ringing signals, and line status on phone lines. It has a long range (up to about 3km/1.8 miles in ideal conditions) and runs on a single 9V battery (not included). The package comes with both units, an earphone, test cables, and a manual in a handy bag. Essential for IT pros, network installers, telecom technicians, or any serious DIYer dealing with cable chaos.