It measures approximately 3" x 18" and comes with a storage case for all accessories. It handles a bike tire quickly, but it took me 20 minutes to fill my car up to 37psi, but it managed. I bought it for my bike so the time it takes to inflate a car tire is not important to me. I'll probably keep it in my car for emergencies, but a larger compressor is easier to use with more volume. It was hot, maybe 150 degrees on a car tire but barely warm on a bike. Programming, automatic switch-off and light are good. I'd say the battery is good too, but I didn't know a battery could power an air compressor and I have nothing to compare it to. It's close enough to their specs to warrant a pass. The instructions state that if you forget to charge it or the battery dies, it still works via the AC adapter and plugged into your car's cigarette lighter, both of which are included. Ideal for bicycle tires, air beds. boats and balls. I've found it to be a good fire and flat tire skin as well. Light is invaluable for nighttime dwellings, no more guessing at PSI.