DriverApp

Select the trailer you are going to link to your truck;
Directly see location of the trailer;
Have a complete overview of all your trailer data including temperatures and door openings e.g.;
Receive alarms and notification is case of abnormalities;
Create temperature reports for the client you are delivering to (when authorized);
Set alarmsets on your trailer (when authorized);
Start and end your trip with the trailer;
etc.