1. Directly hunt 5E, 6, telephone wire, coaxial cable, USB cable and other cables.
2. Check wiring error in 5E, 6, coaxial cable, such as open circuit, short circuit, jumper wire, reverse connection.
3. Locate the wiring or connection error.
4. Measure cable length and determine the distance of open circuit and short circuit.
5. Automatically time-delay shut off and backlight display function.
6. Single board computer software watchdog design and reliable operation.
7. Verify RJ45 and BNC conductors.