Dang! I love a good tool! This one was a little intimidating and I kept it in the box for a while. Finally, when a car I don't drive anymore had a really flat tire in the driveway, it was time. I read the instructions that are easy to follow. The lithium battery comes charged already which helps. I unscrewed the little cap on the tire stem, placed the thing that goes over it from the device, and easy to push down the little locking device. All you need to do is to press the "on" button until the window lights up (and btw, there is an automatic flashlight that comes on in case you are in the dark). Next you just increase the tire pressure you want, in my case it was 44. I pulled the trigger to start the unit, and yes, it's on. The tire pressure said 6! (Which is also good bc it tells you what the pressure is before you start.) So this tire was really flat! I watched as the tire pressure increased, in 1/2 pound increments. It's pretty loud, but you know it's working. So I waited, and it was inflating, and after about 5 minutes, I stopped it at 35 to take a look (pulled the trigger to stop). OK, looks good, keep going. Started it up again, it was already set to 44, so now it's going from 35 to 44. When it hit 44, the unit stopped automatically. I unlocked it from the tire stem, put the little screw thing on the tire and all good. Came inside and plugged it in to keep a good charge. Next day, also rescued another car I had at another location, haven't driven it for a while, 2 tires a bit low. Took like a couple minutes between tires, and voila! No need for AAA! This device REALLY works and I'll keep it in my trunk just in case. Next I'm tackling some vintage basketballs that have lost air, will be able to do with the adaptors (they are in the device, in the front, just open the little door.) Believe me, you will love this product! Great for anyone who has that oh no moment when you need to get somewhere and now what, tire is low. Just fantastic and worth every penny!
