How do I set the pressure on it?

You don't set it. The analog gauge shows the reading while it runs, and you switch it off when the needle reaches your target. Check with a separate gauge if you want an exact figure.

Does it shut off automatically at the right pressure?

No. There is no preset or auto shutoff, so you have to watch the gauge and stop the compressor yourself.

What can I inflate with the three nozzles?

The nozzles fit the usual valve types for car and bike tires, plus balls, air mattresses and pool toys. The hose is 80 cm long.

Can I use it without a car?

No. It draws power from a 12V socket through its 2.8 m cord, so you need a running vehicle or a 12V power source.

How big is it and what comes in the box?

The body measures about 17 x 17 x 7 cm and weighs around 0.75 kg. The box contains the inflator; the three nozzle attachments are part of the unit.

Is it fast enough for a fully flat tire?

It is built for top-ups and small inflatables. Filling a completely flat car tire takes a while, and the unit runs hot, so let it cool between tires.

Where is the Portable 12V Tire Air Compressor cheapest?

At Deal.ai, for $18.99, as of our latest check.

Free shipping on everything10% off your first orderNo account needed · Buy 2, save 10% · 3+, save 15%

Portable 12V Tire Air Compressor

Sold and shipped by Deal.ai

$18.99Free shipping

Buy 2, save 10% · 3+, save 15%

Extra 10% off your first order

Style: 16cylinder

Arrives about Nov 22 – Dec 2, from a warehouse in China

How many?

30-day full refund: if you're not happy with it for any reason, or it never arrives, tell us within 30 days and we refund you in full. Shipping and refunds