Often you need to measure temperature for a variety of reasons. Sometimes you need frost alerts to turn on heaters. You may need to check that the temperature in your cooler rooms are correctly set. Real time sensor telematics enable you to provide customers with complete cold chain accountability for your products and provide quality control. The temperature and humidity can have separate high low values. With the door sensor you have complete reporting on when trailers are loaded and unloaded. The manager group gets real time text alert messages whenever a problem occurs so that you can react quickly. The driver can monitor sensor values on their mobile device and see a red warning out of range condition and can get an audio message if the speaker is enabled.