i think i wouldnt recomend u buy the air compressor. by the time u fill up one tyre, you could drive to the nearest fuel station and get ur tyres filled. it takes really a lot of time but yes it is pretty accurate. i couldnt take a pic because me and my driver met with a small accident and the car is in the service station for repair it would take like another 5 days . btw, my accident review is in my ownership review.