The digital gauge seems to be accurate and easy to read. It's nice, although i am not that finicky or precise about such things. Update:emailed customer service.

All our car tires, bike tires, basketballs, soccer balls and air matresses are 100% pumped! And best of all it’s not too loud and super fast at pumping.

This 12v electric portable digital tire inflator is perfect for inflating car bike tires. The pump comes preset at 350, which is normal sedans and such. It has an automatic shut-off feature when it reaches the pre-set pressure, so i don't have to worr...  Read More

Quite possible that over protection circuitry misbehaves. Mostly plastic despite the ad stating otherwise. It's like it slipped passed quality assurance.

It has zero power coming from the car plugin, and it's specs are not what i got. I require 80 psi to make them work towing a 5th wheel. The unit is not up to the job and does not meet its spec.

Operation seems was uneven up until pressure reached 37 psi (36 was preset). Then shuttled prematurely. Pump immediately shuts off before inflation.

After using twice, air leaks when inflating sice the connector (both metallic and black plastic) part got loosen (manufacturing defect). You have to fight to get the thread to screw on and when you do after finishing filling up the tire the thread jam...  Read More