1. Visible LED status display.
2. Check the RJ11& RJ45 & BNC Cable quickly.
3. Automatically runs all tests and checks for continutiy, open,shorted and crossed wire pairs.
4. Endurable and prevent of burnout.
5. Flashlight helps work in dark.
6. Slow and fast test switch.
1.Don't connect high voltage live lines to avoid buring out the machine.
2.Put into the right place to avoid hurting others,because of the sharp part.
3.Connected the cable to the right port.
4.Read the user manual before use it.