Well I got it today. I haven't tried inflating tires yet. It looks like he's doing quite well. My MOJOR issue so far is that I can't charge it with any of my other USB-C chargers. So if I lose this little 6 inch charging cable I'll go insane and this product will become useless. I've tried several different cables and none of my other USB-C chargers work at all. This means I have to carry an extra cable with me. when riding a motorcycle and hopefully I didn't throw this device away. My device looks used. It has scratches on the screen. Maybe due to this issue or other issues it was returned and then sent back to me? Movie from the screen of a new device? This protrusion was not attached to the screen protector. I am very disappointed with the charge. Too bad it is probably a used device. I'll let you know if it even loads accurately. I have an RV with tires that require 85psi and a motorcycle that requires 35psi and a very accurate gauge.