About the Product: *‎ Battery Powered,Product Dimensions ‎4.9 x 3.4 x 12.6 cm; 290 Grams * Line Finder for Communication Lines, Network Cable Tester LAN RJ45 RJ11 Cable Wire Tracker Phone Generator Tester Diagnose Tone Networking * Cable Tester for UTP STP RJ45(manual switch). Automatic efficient scan for the miss wiring, disorder cable, open and short circuit * TEL BNC test available(Adapter needed). Remotely test cable up to 1000 ft in length Protective power switch for low power consumption * Judge continuity of the cables or wires. Track the cables or wires, and diagnose the break point * Receiver the tone signal on the cables or wires (telephone line) Identify the state in the working telephone line (clear ring, busy) * Send a single solid tone or a dual alternating tone to the object cables or wires