Many enthusiasts probably haven't heard of Tesoro Technology, which is perhaps understandable, since the company is so secretive their web page doesn't even have an ?About Us? section. Apparently based in Milpitas, California, Tesoro started out making mechanical keyboards a few years ago and has since branched out into mice and headsets, all aimed at gamers. Benchmark Reviews has just received their latest product, the RGB-illuminated and programmable Excalibur Spectrum mechanical gaming keyboard, so let's take a look at it!