【Function】: A 100% brand new and high quality cable tester that can help you find and trace buried and hidden wires. Perfect for installation, debugging, maintenance of telephone line and other wires or cables. 【Does not damage the insulation layer】: The cable tracer consists of a transmitter and a receiver, detects the continuity of cables or wires without damaging the insulation, traces cables or wires and diagnoses breakpoints. 【Network cable check】: Receive audio signals through cables or wires (telephone lines), identify the working status of the telephone line (idle, ringing, off-hook), no need to call or spend more, you can do it yourself and repair it. 【Easy to carry】: It can be reused and is durable. Comes with a bag, which can be well stored, avoiding dust and collision. Small, lightweight cable tracker, easy to carry. 【Package Includes】: 1 transmitter, 1 receiver, 1 test cables, 1 carrying case and 1 manual (without battery).