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  3. When using a USB drive, the display reads: “USB ERR” or “READING”, then switches back to radio.

When using a USB drive, the display reads: “USB ERR” or “READING”, then switches back to radio.

Possible Cause: Invalid media or device.

Action: RetroSound® radios will playback Mp3, WMA, or FLAC files via a flash drive. Only Motors 4 and 6 will read from Apple devices. No other devices are supported.

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