TYRE PRESSURE MONITOR SYSTEM FITS ZUMO 390 AND ZUMO 590 Fasten 1 TPMS sensor to each metal tyre valve stem, then pair TPMS with your zumo® 390/590. TPMS uses ANT technology to deliver pressure data wirelessly to your zumo. View that real-time data right on your zumo display. TPMS lets you set custom pressure thresholds. If tyre pressure changes, TPMS issues an alert. TPMS also enables you to monitor tyre pressure trends over time. With TPMS, it's possible to detect a slow leak before it becomes a bigger problem.