That's a good idea, but we often get error messages after a short time. The unit provides accurate tire pressure readings, but then defaults to #5 (no reading) even though we professionally installed a booster on the front tongue of our 22-foot trailer. I want to give this product a higher rating because I believe safety is important. I love that the device is very portable and comes in a nice carrying case. Calibrating tires with the device was not difficult.