See also:

Regulatory Information
FCC Regulatory information – CAUTION: To maintain compliance with FCC’s RF exposure guidelines, use only the supplied antenna. Unauthorized antenna, modification, or attachments could dama ...

Trailer brakes
If your trailer is equipped with a braking system, make sure it conforms to federal and/or local regulations and that it is properly installed. Never connect a trailer brake system directly ...

Speedometer
The speedometer 1 indicates vehicle speed in miles per hour (MPH) and kilometers per hour (km/h). ...