For the item that charges suits as you are wearing them, see Tachyon Device.
The Tachyon Prototype is an item that can be used by speedsters.
The prototype can be equipped to a suit on a Display Stand, charging up the suit with Tachyon energy, depleting the prototype of Tachyon Charge. If the suit has more than 100 Tachyon Charge, the suit will provide 4 extra Speed Bars. Anything below that will be scaled.
The prototype can be recharged by crafting the prototype with Tachyonic Particle Shells.