Roberts Radio Vintage User Manual

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Display backlight
1.  When using the radio powered from batteries, the display backlight 
will be switched on for approximately 12 seconds when any button is 
pressed.
2.  When your radio is powered by the AC mains using the supplied mains 
adaptor the display backlight will always be on whenever the radio is 
switched on.
USB socket for software upgrade
As software updates become available information on how to upgrade 
your radio may be found at www.robertsradio.co.uk