Tachyon Device

The Tachyon device is unlocked upon buying the gamepass, Tachyon device. It costs 200 robux to buy. The tachyon gives you more speed as a speedster. It appears on your suit and gives you +100 speed. You get +1 speed every tme you level up, so it's the same as leveling up 100 times. They are permanent, although you can toggle them off in the settings. While it doesn't reduce your speed, it won't appear on your character. Only applies for speedsters.