Please for the next time, every effort should be made clear on the make and model of your product.
For BESTA CD-580+ English-Chinese Electronic Dictionary:
keyboard shortcuts usage:
quickly switch Menu language between Chinese and English : Catalog
change the input method quickly: Shift + Space
quickly switch between Chinese pronunciation and English pronunciation: Shift + English/Chinese
Back Light : Shift + v
Chinese User Manual only , but have Chinese and English Operation Menu.
Manual for Sony MDR-CD580 Headphones:
http://www.retrevo.com/search/v2/jsp/downloadPage.jsp?doc=8dd3d83f784997fbcdbedaeec0216260&modelid=751581&q=Sony+MDR-CD580
Good luck!
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