QUICKLY FIND THE DESIRED TARGET LINE AMONG MANY TELEPHONE LINES: Find the line on the switch/patch: connect the transmitter to the port of the telephone line to be sought, and use the receiver to find the other end. Compare the size of the beep sound and the brightness of the indicator light. The line with the loudest beep sound and the brightest indicator light is the target line to be found. HEADPHONE FUNCTION: In a noisy working environment, the of the headset can be linked to avoid external interference and maintenance work, and support service technicians to work conveniently and comfortably in a noisy environment. LINE TRACKING: Quickly find the target line from a large number of Internet, telephone lines. Line detection: automatic and efficient scanning of missing lines, random lines, short circuits, open circuits and other breakpoints. Can be used to trace all kinds of cables, including telephone lines, computer network cables, TV cables, ideal for tracing RJ11, RJ45, cables, etc. PROOFREADING THE NETWORK CABLE SEQUENCE: A well-made crystal head can be used to detect the network cable connection or disconnection with a cable finder. PACKAGE LIST: 1 x Cable Transmitter/1 x Cable Receiver/1 x RJ11 Cable/1 x RJ45 Cable/1 x Headphone/1 x Cable with Alligator Clip/1 x Black Bag, Manufacturer: Plyisty