Review on Pressure Monitoring Universal Wireless Power_External by Tommy Penn

It's compact and the solar cells charge it well while driving. It is accurate to within 1psi. Inch compared to the high-quality Campbel Hausfeld pressure gauge on the tire. The range is really good. It reads the pressure when the truck is within 20 feet of the trailer. The alarm clock could have been a bit louder but for the price I live with that.