RF11P THOR PRODIGY SMART 19" 1RU RACK GUARD WITH PATENTED NON SACRIFICIAL TECHNOLOGYOnline Stock only. Thor RF11P Patented PRODIGY Rack Guard When racks are involved space is generally a premium. The Prodigy Rack Guard 11 with adjustable sliding brackets is compact and neat without the bulk.. Patented non sacrificial surge protection as well as Prodigys 30% improved filtering technology. The filtering will clean audio and visual components to ensure crystal clear picture and a blacker sound. Protection from interference typically