See also:

Trailer safety chains
Always use safety chains between your vehicle and the trailer. Towing a trailer without safety chains could create a traffic safety hazard if the trailer separates from the hitch due to ...

For U.S.A.
The following information has been compiled according to Code of Federal Regulations “Title 49, Part 575”. ...

When connecting USB storage device
Repeating is operated in the same way a CD is played. For details, refer to “Repeating”. ...