Features:   Find Wires Quickly&Accurately: This wire finder identifies and traces conductors in a bundle of cables without damaging the insulation. And can identify some specific states of the telephone line.  Multiple uses: This line finder can make the installation, debugging and maintenance of telephone lines easier, suitable for network cable testing, wiring engineering, telephone line repairs and replacement, etc.  Portable Size: This network telephone line cable trackers with the portable size and easy for you to carry around.  Storage Bag: Comes with a storage bag to storage the tools and clips, so that they can be neatly packed in the bag and not easy to lose.  Shielded Lines Finding: Using the working principle of digital signals, it can solve the problems of shielded lines searching and noise in the search lines, making your work more efficient.    Specifications:  Material: ABS  Power: 2 * 9V batteries (NOT INCLUDED)  Working temperature: -10℃~60℃  Working humidity: 20%-70&70%  Sensors size: 67 * 57 * 23mm / 2.3 * 2.2 * 0.9in  Receiver size: 230 * 42 * 25mm / 9.1 * 1.7 * 1.0in  Package size: 256 * 120 * 35mm / 10.1 * 4.7 * 1.4in  Package weight: 356g / 12.6ounce    Packing list:  1 * Sensors  1 * Receiver  1 * User Manual  1 * Carry Bag