"Computer and LAN
This device is designed for protecting of Internet LAN
equipment from electrostatic potentials or power surges,
which appears with thunderstorms.
The device is mounted in a case with both male and female
RJ-45 connectors, and also includes a grounding wire. One
must use a true grounding, but not thunder discharging
lines in order to get the full effect from the device...
From 15 May 2005 y.