Coolerguys Dual USB Fans (Dual 50x10mm)

these fit perfectly in the opening in the front of the index after you remove the plastic cover which is screwed on, not the magnetic bit but the screwed down front panel with t5 or t6 screws, anyway there is a little lip under that which these fans sit perfectly on and only require a tiny amount of tape or blue sticky putty to keep in place, I would recommend buying a small usb fan speed controller to go with these and shortening the wire slightly, although it is possible to tuck the wire inside the index without shortening it, with the fan controller it is a bit tight. They are a bit loud at max speed but at the speed I run them at 99% of the time they are unnoticeable

These dual fans are perfect! i use them for the Valve index VR Headset to keep cool, and i gotta say they work perfect! i have the fans attached to both openings on the front of the VR headset so hot air ventilates out as cold air flows internally, keeping the headset and my face cool at the same time i play VR. i dont have anything to mount the fans on so i just used adhesive tacks to keep the fans in place. but overall, i couldn't imagine being in VR for too long in a day without these dual fans!

Bought these for a media cabinet, bought 3 and hooked them to my receiver. Absolutely love them so far!!

USB QUALITY cooling fan ... Thank you.

Perfect fit for my Index VR headset.

Exactly what I needed. I ended up getting an additional USB speed controller to be able to reduce the speed and noise, but can't fault it for that as it does exactly what it's supposed to.

Works great, just wish it came with some skrews. They might now but mine didn't.

Very easy to install