Although many electrical problems have their root in external causes such as lightning, utility grid switching and line slapping, most are caused by factors inside our homes and offices. Something as simple as turning the lights on and off will cause surges of power and transient voltages. For the protection of specific home or office electrical devices, EFI has created the PowerTracker line of plug-in surge suppression products. All PowerTracker models include diagnostic lights, noise filtration, thermal fusing for safety, lifetime product warranty, and a connected equipment warranty of up to $25,000. PowerTracker models are available to protect computers, modems, VCR's, TV's, DSS and C-Band satellite systems, as well as other household appliances. In addition to the PowerTracker line of products, EFI also recommends whole house protection offered by the HomeGuard® and Titan 65AR models.