Description: 【Multi-functional】: This network cable tester scans telephone and network cables and checks power cables for open and short circuits. And with the addition of a DC voltage test and low voltage warning function, it is a truly comprehensive testing tool. 【Head-End 】: This network cable tester with head-end function makes it easy to test and troubleshoot any signal problems at their source, enabling problems to be detected quickly. 【Flashlight Lighting】: The network analyser also adjusts the volume and the built-in torch function makes testing easier in low light conditions and can be adapted to any test environment. 【Low Voltage Warning】: The low voltage warning function warns the user when the battery is running low, eliminating surprises during test operations. 【High Quality】: The measuring cable tool is made of high quality ABS material, which is durable, waterproof, sunlight resistant, wear and scratch resistant and has a long service life. Size Chart:     Package Includes: 1set Network Cable Tester Note: 1. Plug the RJ45 connectors on both ends of the network cable to be tested into the corresponding ports of the transmitter and receiver. 2. Turn the function selection switch of the transmitter to the "Test" position, and the "VERIFY" indicator light illuminates, indicating that the transmitter is operating normally. 3. Determine the characteristics of short circuit, open circuit, open circuit, and crossover based on 18 sequence lights. During the test, you can touch the "On" button to switch between fast and slow speeds. Use the automatic scanning method to quickly test twisted pairs 1, 2, 3, 4, 5, 6, 7, 8, G by pair, and distinguish which pair (pair) is abnormal, shorted, or open.