[Easy to Use] This cable tester can quickly and easily find breakpoints without opening the wire cover. Audio signals are received via cables or wires (telephone lines). Tells you the status of your phone line, such as idle, ringing, or busy. Inspects cables safely without disturbing cable installations. Sensitivity Test MS6812 cable locator is equipped with a very loud horn. Even if the tester is noisy, it can track the cable closer and identify cable problems. Determine the status of the company's phone line (off, ringing, busy). [High Quality] This wire tester has a sensitive sensor module that can quickly detect and respond to problems in the working circuit. Easily install, deploy, and maintain one or more telephone lines around your home or office with this high-quality tracking system. [Function] Robotic lawnmower wire detector can check wire continuity and detect short circuit, open circuit, and crossover condition testing. 3000m effective detection distance. Simple and easy to use. [Packing List] 1 * transmitter, 1 * receiver, 1 * user manual, 2 * battery. Product Sensitive Sensor Module The cable tester has a sensitive detection module that checks wire continuity and detects short circuit, open, and crossover condition testing. Area Internet cafe hotel network computer room power supply maintenance monitoring installation network line engineering Does Not Damage Insulation Cable detectors detect the passage of cables or wires without damaging the insulation. Check cable continuity. Locate cables or wires and diagnose breakpoints.