Can it pick up water and dry debris?

Yes. It is a wet/dry vacuum with a 2-gallon tank, a foam sleeve for wet pickup and a cartridge filter for dry debris. Switch the filter setup to match the job.

How long does the 2.0Ah battery run?

Shop-Vac does not publish a runtime figure. Expect short cleanup sessions rather than long continuous use; a spare 20V battery is the practical fix for bigger jobs.

What comes in the box?

The vacuum, a 5-foot by 1.5-inch lock-on hose, gulper nozzle, crevice tool, foam sleeve, cartridge filter, one 2.0Ah lithium battery and a charger.

Does the blower work separately from the vacuum?

Yes. The blower detaches from the unit, so you can use it for patios, garages and driveways without the tank attached.

Is it good for car interiors?

Yes. The cordless design and crevice tool suit seats and footwells, and the 2-gallon tank handles typical car debris. It will not match a corded vac on suction.