Tachyon prototype

The tachyon prototype is a device developed by Mercury Labs that can absorb the "Speed Force".

Usage
While a physicist was building the first tachyonic prototype, a man in yellow attempted to steal the device but was prevented from doing so by the physicist who locked the door to the prototype's chamber. Believing that the device would serve as an effective lure for the man in yellow, Barry Allen procured it from Dr. Tina McGee and brought it to S.T.A.R. Labs where Cisco Ramon, Caitlin Snow and Eobard Thawne (as Harrison Wells) had built a trap for the man in yellow. Despite these precautions, the man in yellow managed to steal the device. Eobard later put it on the chest of his suit.

Eobard acknowledged to Gideon that the device was a stopgap measure, rather than a cure for his problems with his superspeed.

Eobard decided to use the tachyon prototype to convert it into a device that can split Firestorm back into Ronnie Raymond and Martin Stein even though it would set his own plans back.

After traveling back in time and obtaining information on increasing his speed without the aid of the dangerous Velocity 9 drug, Barry went to ask Eobard advice on how to get faster, which Eobard's answer was tachyon enhancement and gave Barry a hard drive containing the steps to build a tachyon prototype. Later, Barry and his friends created their own tachyon device to enhance the Speed Force in Barry's system. During the test run, Barry accidentally traveled to an alternate Earth. With the aid of Supergirl and his tachyon device, Barry made it back home. At Barry's request, Harry Wells miniaturized the device to fit behind the emblem on his suit. With Harry's enhancements from using the tachyon device, Barry is able to outpace Zoom.

But after Zoom captured Wally West and was given Barry's original Speed Force, Barry lost all of his speed gained after he used the prototype, although he is slightly faster than originally.

Known users

 * Eobard Thawne/Reverse-Flash (formerly)
 * Firestorm (modified as a Quantum splicer)
 * Barry Allen/The Flash (formerly)

Trivia

 * According to Eobard, if one properly harnesses tachyon particles, they can use them to move faster than light and be "invincible".