The Cat 5 tester can test Rj45 networking cables and other types of cables. It will indicate faults such as shorts or crossovers on the led display. Complete cable runs from panel to socket can be tested by using a patch lead and the remote test unit. Ideal network cable tester.- Cable continuity tester, Rj45, Rj11, BNC- LED Display- Faster internet speeds: ADSL filters help to reduce interference on internet connections, which can lead to faster speeds.- Reduced noise: ADSL filters help to reduce noise on both telephone and internet lines, which can create a more pleasant listening and viewing experience.- Improved security: ADSL filters can help to improve the security of your home network by blocking unauthorized access.