>>353007546
I'm using 4 total.

>Headset
>3x tracker dongle whatever things

You'll also want to get some usb chords and usb chargers to charge the 3 trackers separately, because if you plug them into your computer to charge them (as in, you unplug the 3 dongles and plug the 3 trackers directly) while playing VR, things get a little fucky as steamVR will sometimes will use them and you'll end up like a mangled corpse, unable to disable fullbody until you unplug them.