My PC won't even load the Bios with this connected to any of my USB ports. It does work if I connect it after Windows starts.

I tried this item because of the reviews, I was trying to pass the emissions test and also see if it does indeed helps with the fuel economy, it did not do neither, the engine light was even after restarting the computer, I made sure to follow the steps and the car fuel economy is exactly the same, waste of money, I will warn you that this thing does not work at all, it may work as a placebo on your brain otherwise is just a waste of money

Turned on exactly once for 5 minutes & was too bright at the distance I was from phone (arms length) even at lowest setting. Not useful unless at selfie stick distance, and I dont use those. On top of it... the light ass not worked since. Waste of $$

Great exprience, very convenient and cost effective. I love it, will do it again. Better than buying the product from store