Basic Protection Against Power Surges for Computers and Electronics. USB charging ports Simultaneously charge mobile devices, including smartphones and tablets. Protection Working Indicator 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. If still under warranty, APC will then replace your damaged SurgeArrest free of charge. Resettable circuit breaker Easy recovery from overloads; no need to replace a fuse. Right Angle Plug Plug angle allows for equipment and furniture to be placed closer to the wall than with a standard power cord. Reduces cord stress too. EMI and RFI noise filtering Reduces line noise that can cause data loss and keyboard errors. 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.