Review on 🚗 BOSONER Portable Air Compressor Pump Tire Inflator with LED Light for Car, Auto Shut-Off, 12V DC Portable Air Compressor for Car Tires, Motorcycle, Bicycle, Balls, and Other Inflatable Equipment by John Castle

1) Chinese origin and instructions, so the translation is a bit strange in places. 2) It is necessary to select preset units of measure; there is more than one PSI option. 3) You will expectantly use the gas to inflate when the tires are really low. 4) The bus connector is screwed on, not pressed in, so make sure it is firmly seated. 5) The line is a little short when the hoop is not down (but may dangle). 6) After you have set the desired pressure, the pump will not start until the display shows "0" again and stops flashing. 7) My machine registers the pressure and says it is a pound higher than the pump is showing. I have tested this with a hand meter on my car and another and found it to pump higher than the reading so be careful! (I've now adjusted it to 2 pounds less.). 8) it shuts off automatically and has enough pressure to get the job done by car which was my goal when purchasing this unit. UPDATE: This unit lasted just over a year before the internal (non-replaceable) tubes blew out and had to be thrown away. Based on this and my previous reviews, I advise against the purchase.