>>321759653
>So, these $25 dollar ones don't have to be modded like the Steam Controller dongles do, right?
They are already pre-flashed. You plug them into your computer and use pair controller via SteamVR. The fourth tracker won't be useable for VRChat sadly. However you could use it in let's say NeosVR where you can have up to 8 extra points of tracking.