Hanvon WISEreader N618 User Manual page 38

If the Micro SD card is not recognized, re-insert the
Micro SD card or restart the device. When the
system is reading data, please do not remove the
Micro SD card or reset the device.
If the Micro SD card needs to be formatted, please
backup all data on the Micro SD card first, and then
select FAT-32 format.
Miscellaneous
1. Under direct sunlight or in low-temperatures, the
characters displayed on the screen may fade. Please
enter the "Settings" interface and select "Global" to
refresh the entire screen.
2. Due to memory limitations, the device might not
read certain complicated DOC, PDF and HTML files
properly.
3. The display format can't be changed in the
following interfaces: "Recorder and Player,",
"Settings," "Memo," "Notepad," and any menu.
4. Prevent hearing impairment
Using the earphones for an extended period of time
at a high volume may damage your hearing. Please