Electric Air Compressor Pump, 12V DC Portable Tire Pump with Digital Display up to 150PSI with Emergency LED Lighting and 10ft Long Cable for Car, Bicycle, Ball and Other Inflatables

Placed chuck on tire and read 23 PSI. set to 31 and started unit. Ran for 7 minutes and shut off at 31 PSI. Tire looked strange. Checked with a digital tire gauge and ir read 54 PSI. Overinflated by 31 PSI. Lucky it didn't rupture the tire. Unsafe unit. Immediately returned for refund.

Well packed. Went from delivery truck straight to my cars flat tire.A little noisy, but I expected that for a smaller unit.Tire pressure started at 2 psi, 7 minutes later 32 psi. Very impressed for a unit at this price point.The only reason for 3 stars is because it worked as it should. Will update when use increases.I would recommend this unit at this price and size.UPDATE: Great little unit. Love the idea that you store the hose directly in the back of the unit.Have used it several times. connection to tire valve stem is great.STRONGLY recommend this item.

I like the convience of it for inflating car tires. However, my car has a pressure gauge on the dashboard and the numbers don’t match. I set this to 35psi, but it went to 38 on car. I kept adjusting to find the right number. 28 on the unit got me to my 35. So it’s usable, but be aware of pressure.

I purchased this tool for my car, and so far it has been a great investment. The tool is small and lightweight, and packs enough power and speed to inflate tires to the correct pressure.The ability to set the pressure level is great, and since the tool measures the tire pressure, it automatically stops when it's filled. No more guesswork with crappy tire gauges!Attaching the nozzle to the valve stem is easy and it makes a clean seal. The ability to power this unit with the A/C adapter is great too, I only wish it had a longer power cord so I didn't have to string it through the car to get to the other side. That is the only complaint I have, but it's such a minor inconvenience that it doesn't detract from the value of the compressor.Definitely get one of these, it's such a convenience not having to fiddle with the compressor at the gas station anymore!

I got this air compressor because my tire on my car has a slow leak. I love this device! I can set a custom PSI and the compressor will fill my tire in minutes! Quick and convenient to do at home or anywhere. Small, compact, won’t take much room in your trunk. LED light on front makes it easy to see the valve stem if it’s dark. Air hose has a lever that locks on to your valve stem which prevents air loss as you’re inflating your tire. My tire stayed inflated to the proper level for about a week. Works much better than most gas station air pumps, which can be difficult and costly. Digital readout will tell you exactly how much air is in your tire, and will shut off automatically when the desired pressure is reached. This air compressor is well worth the price, and will pay for itself when you don’t have to spend gas, time, and money when you have to find a gas station with an air compressor which may or may not work properly. The air with this device is free!!

Pros: It's cheap. It works for inflating your tires.Cons: Completely inaccurate as everyone else has already pointed out. This leads to over inflating your tires. Trying to release some air to get the PSI # your tire is recommended to be at. If your vehicle is like my vehicle the TPMS system does not update air pressure real time and there is a lag. Therefore your tires will end up very over inflated even when trying to adjust for the wonky PSI number on the device. Then you will go release some air from the tire to have it be slightly less than ideal. Then you have to go back and add some more and hope it's accurate.Major PITA to use, but it does work and the price point couldn't be beat. I'd give it 2.5 stars if I could figure out how to adjust the stars to include half a point.

After you hook it up, the display shows the tire pressure. Then you input the value you want. At that point the machine is suppose to automatically increase the tire pressure to the value you set. I did all that. The display showed 27.5. I set the value at 35 but the machine ran for 4 minutes and then shut off. I measure the final tire pressure with my own gauge at 48 psi. Perhaps I made a mistake, so will try again soon.

Works without any problems and seems like it meets the specs in the product description. I like that I can select required pressure and the device will turn off by itself when done. It’s very compact and won’t take much space in a trunk. It is indeed less noisy then my previous one and its pressure gauge is pretty accurate. I only wish its hose would be longer.