LCD Timer Saves power by automatically turning equipment ON and OFF based on six preset time programs. Select the exact time and day of the week that your equipment receives power from the "Controlled by Timer" outlets and prevent unnecessary electricity waste. EMI and RFI noise filtering reduces line noise that can cause data loss and keyboard errors. Compact size easily mounts in tight spaces. Allows installation in close proximity to the protected equipmment, enhancing surge suppresion perfomance. Fail Safe Mode 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. Catastrophic Event Protection 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. Building Wiring Fault Indicator This LED informs users of potentially dangerous wiring problems in the wall circuit. Lightning and Surge Protection to prevent damage to your equipment from electric power surges and spikes.