Doran Manufacturing has come out with their own TPMS system, called the Doran 360. They are no longer a Distributor for PressurePro, although they may still have some left-over stock.
Word has it that that Doran is being sued for Patent Infringement and Breach of Contract by the PressurePro company. I would be leary of buying any new product such as this, especially when there are legal issues involved. Important Note: Doran never did manufacture PressurePro, nor does it manufacture its new product, the Doran 360, which is actually manufactured in China. Fred M.