After installation of the FoboTire pressure monitor system for smart phones I began looking for solutions for checking and inflating my Model S tires without having to make a trip to the nearest gas station (ugh) with free air (very hard to find these days) or using a lighter socket powered inflator. I was hoping to find a cordless inflator that would read the pressure at the same time it was inflating the tire. I also wanted to take readings before any driving warmed the tires (yes, I'm a total fanatic about maintaining correct tire pressure). Sears to the rescue. There I found the Craftsman 19.2 volt cordless inflator, which enables setting the desired pressure and automatically stops pumping air when it's reached. It has a digital gauge on the back that reads the pressure as you inflate the tire. I tested it this morning. Using the the inflator I set all of the pressures to 44 psi then used the Fobo monitor to test its accuracy. The Fobo recorded all four tires at + or minus 0.3 psi from the 44 psi seeing. That's incredible accuracy. This tool will be kept in the car at all times.