The OneX Tyre Pressure Monitoring System (External) for OneNav allows you to monitor the temperature and pressure of all four tyres via your entertainment system. It uses four tyre valve replacements that transmit RF signals to your head unit. Features include slow leak detection, fast leak detection, low and high pressure warnings, and identification of the affected tyre. Users can also set the pressure and temperature thresholds for customized alerts, making it ideal for 4×4 vehicles.