How long does the battery last?

Fanttik rates the X9 Pro for up to 23 minutes of continuous inflation on a full charge. In practice that covers several car tires or many bike tires between charges.

Does it stop automatically at the right pressure?

Yes. You set the target pressure on the digital gauge and the inflator shuts off when it reaches it, so you do not have to watch the display.

Can it inflate car tires?

Yes, it is built for car, bike, motorcycle and trailer tires. It is not meant for high-volume jobs like large air mattresses or big off-road tires.

How does it compare with a 12V plug-in compressor?

It runs on its own battery, so there is no cord to the car socket, and it is easier to carry to each wheel. A corded compressor can run indefinitely as long as the car is on.

What comes in the box?

The inflator, a charging cable and a nozzle kit for tires and inflatables. Check the listing for the exact adapter set.

Is it worth it over a cheaper mini inflator?

It offers a digital gauge, automatic shutoff and a longer continuous run time than most pocket inflators. If you only top up bike tires occasionally, a simpler model will do.