Review on HONGNAL Portable Air Compressor Tire Inflator, 150PSI Car Air Pump Compressor 12V DC with 4 Nozzle Attachments, LED Light, Air Hose, Battery Clamp for Inflating Car Tires, Bicycles, Trucks & Inflatables by Major Callaham

Yes this is a 5 star product with 4 star performance. But I don't, so it's okay. It can be turned off, but is permanently off. Whether one or all four tires are full; They all have the same pressure selected to stop. Here's the trick I learned. Run the pump until the plug is removed. That way you don't lose air pressure. Also, go a pound or two more than you want. Gauge readings are different for dynamic and static pressure. Although easy to use, it would be easier if they installed a snap clip connector on the catenary. Otherwise take it out of the bag, insert or connect the battery, unscrew the plug and switch on. Now how difficult is it? It's lightweight and doesn't bounce around compared to others. It's also not as loud as some. I bought it for two reasons. First its color. They keep it in the Ford. Second, because it's about $20 cheaper than GSPSCN, and I love that too.