The updated Hurricane now features a 200PSI digital gauge, that means no more need for the "gauge isolation valve" to isolate the gauge from over loading the gauge when the hurricane is connected to a high pressure air source. Simply connect and the gauge will activate for air down or air up, its even more convent to use than before. Additionally, upon comparing the digital gauge vs the previous analog gauge, we have found that the digital gauge reading was more in sync with the on board TPMS reading (tested on a Jeep JK on 35" BFG KM2).