Features basic protection against power surges for computers and electronics With EMI and RFI noise filtering that reduces line noise that can cause data loss and keyboard errors Protection of data lines (Ethernet, Coaxial and Phone lines) ensures complete protection of your equipment from surges It is very important to protect your equipment from “back door” electric surges traveling through data lines, as they can be as damaging to your equipment as surges traveling over power lines Easy recovery from overloads; no need to replace a fuse Most other surge suppressors continue to let power through even after their circuits have been damaged, leaving your equipment exposed to future surges APC's SurgeArrest fail safe, which means that once the circuit of an APC SurgeArrest has been compromised the unit disconnects equipment from the power supply ensuring that no damaging surges reach your equipment SurgeArrest components such as MOVs and Thermal fuse ensure instantaneous reaction to lightning strikes and wiring faults If the surge components are damaged due to power spike or over voltage, excess power cannot reach your equipment Unlike the APC SurgeArrest products, most surge suppressors continue to let power through even after circuits have been damaged, leaving your equipment exposed to other damaging surges This LED informs users of potentially dangerous wiring problems in the wall circuit SurgeArrest will warn you if its circuitry has been damaged by heavy strike or power line surge and it is unable to provide 100% protection