Will this compressor work while I'm driving, or only when parked?

It's designed for parked use only—connect it to your 12V socket, park, and inflate. Running it while driving risks draining your battery and reduces air flow.

How long does it take to fill a car tire from near-flat?

Exact time depends on tire size and how low you started, but portable 12V compressors are slower than wall-mounted shop units. Budget extra time for emergency fills.

Can I use this on a motorcycle or truck tire, or just regular car tires?

Universal valve adapters are included, so it works on cars, bikes, trucks, and any inflatable with a standard valve. Test fit the adapter to your valve before relying on it for critical inflation.