Profeional LAN Network Cable Tracker Tester Line Finder Telephone Wire Tracer Breakpoint Location Detector Feature: Perfect for installing, debuging, maintaining telephone line and other wires or cables. Detect continuity of the cables or wires without damaging the insulation. 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. Include a sender (MS6812-T) and a receiver (MS6812-R). A profeional & safe tool for wireman. Specification: Send tone frequency: 1.5KHz Receiving frequency range: 100-300KHz Power supply: 6F22 9V (not included) Receiver size: 240x48x24mm/9.45x1.89x0.94in Transmitter size: 145x34x24mm/5.71x1.34x0.94in Note: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-3cm measuring deviation due to manual measurement. 1 X Transmitter 1 X Receiver 1 X Carrying Bag 1 X Instruction