I am surprised that no one has yet mentioned the Tire-SafeGuard sold by the HCI Corporation. We thoroughly studied the various brands, such as Pressure Pro, before purchasing, and concluded that Tire-SafeGuard was best. We monitor the six tires on our 39' Dynasty and the four on our Jeep in tow with no extra antenna or repeater. The unit measures heat as well as tire pressure. They have one model which allows you to add air to the tire without removing the sensor. They have great customer service. We are very happy with our unit. Jim Hart
