Feature:1. Identify the state in the working telephone line(clear, ring, busy).2. Receive the tone signal on the cables or wires(telephone line).3. Judge continuity of the cables or wires without damaging the insulation.4. Send a single solid tone or a dual alternating tone to the object cables or wires.5. Track cable routes and identify where a line breaks.6. Perfect for installing, debuging, maintaining telephone line and other wires or cables.7. Identify the state in the working telephone line(clear, ring, busy).8. Receive the tone signal on the cables or wires(telephone line).9. Judge continuity of the cables or wires without damaging the insulation.10. Send a single solid tone or a dual alternating tone to the object cables or wires.11. Track cable routes and identify where a line breaks.Specification:This Telephone Wire Tracker is easy to operate with smooth appearance. It's a multi-functional handheld cable testing tool to determine whether the cable line is continuous. It can identify the state in the working telephone line(clear,ring,busy). A professional & safe tool for wireman.Features:Identify the state in the working telephone line(clear, ring, busy).Receive the tone signal on the cables or wires(telephone line).Judge continuity of the cables or wires without damaging the insulation.Send a single solid tone or a dual alternating tone to the object cables or wires.Track cable routes and identify where a line breaks.Perfect for installing, debuging, maintaining telephone line and other wires or cables.Specifications:Brand: BSIDEModel: FWT21Material: ABS PlasticColor: BlackAudio Signal: 1.5kHZReceiving Frequency Range: 100Hz-300kHz Receiver Battery: 1 * 9V 6F22 Battery (Not Included)Emitter Battery: 1 * 9V 6F22 Battery (Not Included)Receiver Size: 238 * 43 * 26mm / 9.4 * 1.7 * 1.0inEmitter Size: 145 * 35 * 25mm / 5.7 * 1.4 * 1.0inReceiver Weight: 72g / 2.5ozEmitter Weight: 65g / 2.3ozPackage Size: 28.3 * 12.5 * 4cm / 11.1 * 4.92 * 1.85inPackage Weight: 262g / 9.3ozPackage list:1 * Transmitter(FWT21 Sender)1 * Receiver1 * Carrying Bag1 * User ManualPackage List:1 * Transmitter(FWT21 Sender)1 * Receiver1 * Carrying Bag1 * User Manual