AstroAI Tire Inflator 12VDC, 150 PSI Portable Air Compressor, Digital Car Tire Pump with Pressure Gauge, Automatic Shutoff Air Pump for Car Tires, Fast Inflation 9.84ft Longer Power Cord, Gift

Works as expected. End fits over car tire valve perfectly creating good seal. Set psi then turn on. Once tire is inflated, end pulls off easily with hardly any air leaking out. I doubled checked psi pressure with my own tire gauge, and it was accurate. Of course, it is slower than an air pump at a gas station but incredibly convenient. Highly recommend!

The reason for my rating is that I have now purchased five "AstroAI Tire Inflator 12VDC, 150 PSI Portable Air Compressor, Digital Car Tire Pump." I have one in each of my vehicles and gave a few away as gifts. It was simple to operate and it works so I never leave home without it. It is just another tool that gives you peace of mind when your are out and about.

The pump worked very well for me, aired my tire up quickly, it is noisy but does a great job.

Very easy to use and quickly inflates all for tires to desired PSI.

I have used this item to inflate and deflate the 26x4.0" tires on my bike several times, indulding on the trail. I keep the inflation high (25-30psi) on paved, hard packed trails and gravel roads. I deflate them to 10-15psi when I arrive and enter a wooded or MTB trail then reinflate them when I head home. This device has more than enough battery capacity to handle my needs. Il connects and disconnects easily and quickly to the tube valve and virtually no pressure escapes. It is a little bit large and heavy to carry in my bike bag but the battery capacity is worth it to me. I want to mention that the build quality seems very good.

The best and most reliable air pump I ever had and I have had several.

When I got this I wasn't sure. this little gadget could do the job but I was pleasantly surprised. It works great. It's easy to use. Pardon the pun but.... It's like a breath of fresh air.

This is a lifesaver. No more paying for air. It will pay for itself quickly. The machine pumped up my tire efficiently. It's compact and fit in it own bag that comes with it. Overall this is a great tool to have

Get one. Keep it in your trunk. Get one for your spouse's car. Get one for your kid's car. This is a no-brainer, peace of mind purchase for which you'll thank yourself over and over again.

wanted a pump for inflatables at the beach or pool. Didn't realize this unit needs to be plugged into the auto for use. Have to return.