zumo 390LM is the first in the motorcycle series from Garmin to be compatible with the NEW integrated Tire Pressure Monitor Sensor3 (TPMS). Add a sensor for each tire and easily monitor the pressure using the zumo display. The system works with up to 4 tires in any configuration. One TPMS sensor is required for each tire. [video]http://www.cycleworld.com/2013/09/09/garmin-zumo-390-motorcycle-gps/[/video]