This device is not portable at all because it does not have battery.Can be useful for car owners, but not for the rest of the usages.Being connected with cable to car - works quite well, seems powerful.

I have one come with my car, it takes a while to inflate the tyre, I bought this one for another car, and it is much more powerful and compact, very easy to use too.

Based on my first use, it's worked flawlessly. All my tyres were a little low and they each went from 25psi to 32psi in under 1 minute. Pretty quiet compared to my previous ones. Easy to select you pressure readout (psi, bar etc) and to set required pressure. Stops exactly on desired pressure. LED light is small but plenty bright enough. Power cable is a decent length as well.My only negative is the pouch is a little small for everything. You have to tetris it all in.Overall, I'm very impressed and hope it lasts.

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After my battery powered tyre inflater died (used less than 10 times & last about a year), I decided to get a 12V cigarette plug unit so I not worry about the battery issues. This thing much smaller and lighter. It has all the standard features & could change the metric from bar to psi. I have a battery jump starter which feature12v cigarette output, so I can either use the power from the car or the jump starter. Perfect.

Brilliant. Can't believe how compact and quite it is compared to other pumps I've had. It defender packs a punch. I was surprised by its small size that it pumps air as fast as the much larger ones. Comes in a neat storage pouch complete with all attachments for anything you can think of.