Other information:
A USB flash drive of 256 MB or higher is recommended.
Some digital audio players may not be compatible.
Some USB flash drives (e.g., a device with security lockout) may not
work.
Some software files may not allow for audio play or text data display...
The USB port (1.0A) is for playing audio files
on a USB flash drive, connecting a cellular
phone, and charging devices.
Models with Display Audio
The USB port (1.5A) is for charging devices,
playing audio files and connecting compatible
phones with Apple CarPlay™ or Android
Auto™...