This is a commercial grade tire inflator that hooks up to a standard shop air compressor. It has a nice display with big numbers and a blacklight. It seems to automatically turn on when it senses the tire pressure but can also be turned on with a button. The units can be changed between PSI, bar and kPa, I use PSI. The trigger has an easy to use double action: half squeeze lets air out, full squeeze puts air in. The unit it received is a little tight on the valve stem and I have to give it a good push and twist to get it on, but it seals well. Also of note is that while it comes with a quick disconnect fitting, it doesn’t fit any coupler I’ve seen so I unscrewed the supplied one and replaced it with a standard 1/4″ quick disconnect plug. The rubber hose section seems like good quality hose. Overall it’s a nice tire gauge and inflator.

It’s currently available on amazon for $39.87 here: http://amzn.to/1Wpn72W

Full disclosure: I received this item free or at a discount in exchange for an honest review.