EPAuto 12V DC Auto Portable Air Compressor Pump/Tire Inflator for Compact/Midsize Sedan SUV

I like it! I was maintaining 12 tires for our 3 cars with a hand pump, and that was exhausting. So, I decided to splurge on myself (yes, messy), and get this air pump, and I'm glad I did. It's nice and small and I like how the power cord and the air hose both fit nicely inside a compartment in the unit. I like how I was able to fit the cords back inside the compartment after using it also. The power cord is just long enough to reach all tires on a Honda Odyssey - don't know about bigger trucks. It pumped 8 tires in succession without overheating. Pumping about 5 lbs took a couple of minutes per tire. While it is loud when running, I tend to fill tires during the day when nobody is sleeping. I saw one reviewer complaining about air loss during disconnection (it actually screws onto the valve stem) but that was not a problem at all. The built-in pressure gauge is too small to be useful, just good enough for approximation so you know when to turn it off. Everyone should be using a good hand-held pressure gauge anyway for precise measurement. This unit seems to be well-built. I recommend it.

Perhaps the dial isn't as accurate as it could be, but it seems to be consistent, which is all I need. I like that the valve screws on to the valve stem and doesn't 'pop off' under pressure. It may lose a pound or so of air when unscrewed, but slightly overinflating allows one to check the actual pressure with a tire gauge and 'bleed off' to the correct amount. The pump is noisy (but not objectionable) and it takes time to inflate to 50+ lbs, but for the money, this pump works just fine. I especially like the compact size and form factor.

It’s works great. I liked the built in pressure gauge, which seems to remain accurate. This little box is loud! If you have to pressure up a tire early in the morning, your neighbors won’t thank you.It’s not particularly fast; not like a commercial compressor, but I didn’t expect a small box compressor to be fast. It took about 5 minutes to fill a run-flat tire from 16 to 34 psi.It’s a great convenience. Fits in a small bag in back of my Mini. Great for run flat tires to get you to a station. Safer than trying to change a conventional tire roadside. It can give you enough air to get off the highway to a safe spot.

Used it today to fill up two flat tires for one of my friends. It was very cold with lots of snow on the ground and was about 16 degrees. I know the operating temp is 20-120 or so and it worked pretty good at 16.Nozzle was easy to use, so I don't know why a few people were commenting that it was difficult attach and remove. It's likely they mis-threaded the nozzle.To inflate the tire on a Jeep Grand Cherokee took about 5-7 minutes to get it from fully flat to 25lbs, which was enough to drive to the gas station for a proper fill-up. Both flat tires took about 15 minutes total with no rest time. If I were to guess, it would take about 10 minutes to get to full tire pressure. I'm sure it would take less time if the tires were off the SUV, but even with the full weight on two tires, it did a good job of inflating. I can't say about the longevity of this pump, but so far it's working.Yeah, it's noisy. I don't really think anyone should care especially if you're trying to avoid being stranded somewhere. Let the neighbors complain.

I've owner other small portable compressors, but this is the best I've seen. It is very compact, loud but no louder than the bigger ones. It inflated my tires surprisingly fast. I like its simplicity. Durability will be the long-term test, but it makes a great first impression. One potential drawback IF you have a large vehicle -- the cords are short. I was just able to reach my rear tires with the device plugged into the cigarette lighter socket near the dashboard. On a longer vehicle, you'd need a plug location in the back seat or hatch area. I also loved the screw-on connector to the tire valve, much superior to the clamp style on other compressors. UPDATE January2020: I've owned this for two years, it has bumped around in my trunk during freezing days and summers of triple digit heat, and it still works great. So I rate it 6 stars.

Update: I since made an adapter to connect my two 100W panels in parallel, and tried again. Now it has sufficient power to get my bike tires up to about 45 PSI at least. Good enough for me.Original (1-star) review:I bought it because it has an analog dial, and I wanted to use it at a higher voltage (36VDC directly from my solar panel). It ran at no load when I first turned it on, but after turning it off and trying again it wouldn't start. There are 5 screw holes, one hidden behind the label in the center, but a normal Philips screwdriver won't fit the holes, so had to file down a #0 jeweler's screwdriver to a little past #1 to unscrew the cover. Once I opened it, I realized I hadn't burned up the motor, it's just that when the compressor piston reaches top dead center there is an immense amount of pressure needed to push it past that point. You can feel it by manually turning the gear. You can get it to start again by manually pushing it past TDC, but only at no load. My bike tire was at 40PSI and it couldn't do even one turn against that back pressure. Maybe good enough for the Boston Patriots, but not for a bicyclist. And of course I can't return it because I modified the power cord to fit my solar panel.