1. Measure network cable length and determine the distance of open and short circuit.
2. Check wiring error in 5E, 6E, coaxial cable, such as open circuit,short circuit, jumper wire, reverse connection.
3. With 8 remote identifiers , more easy to work.
4. Portable unit with long battery life (wait-case 50 hours).
5. Automatically time-delay shut off.
6. Selfchecking and automatically compensate any change in battery capacity or ambient temperature.