AEM 52mm X-Series Digital GPS Speedometer GaugeAEM's X Series GPS Speedometer (PN 30 0313) display ground speed, course and altitude via an included 10Hz GPS receiver. Users can integrate the X Series GPS Speedo into an Infinity ECU to add track mapping, and an included Vehicle Speed signal can be outputted to an existing speedometer to eliminate the need for a vehicle speed sensor. A 10Hz GPS receiver receives speed, heading and altitude data from multiple satellites at 10 samples second