- It's this...thing. And it's, like...cool. It's shiny...it has all sorts of moving parts. And it does things. Cool things! (Largo, 289)
The Cool Thing is roughly spherical, containing many parts which swing out from it; some appear to be motorized. Largo is usually shown fiddling with it, although one scene (in Largovision) shows him using the Cool Thing to summon ph34rb0ts. He also uses it to charge Ping directly from a power pole.
The Cool Thing has been shown to be able to transform or expand as seen in "we got him". The device appeared to have expanded a cylinder from one end, and opened a tool from the top. Largo retrieved the Cool Thing from the Muffin Cart and attempted to use it as a means of defeating Nanasawa Kimiko's fans at the Sight event at Animate, implying it can be used offensively. He stopped moments later on seeing the situation was resolving itself without drastic intervention, or perhaps in an act of restraint.
It was also said in Megatokyo Vol. 1 (Studio Ironcat) that as soon as the function of "The Cool Thing" was discovered (beyond Largo's delusional fantasies) that it would be available in the MegaGear shops (to which Shirt Guy Dom says "God bless America" in an obvious slap in the face of the sterotypical ideals of America's capitalism).