Roberts Radio FM RDS/DAB Digital Radio RD-50CFM - Manual (Page 17)

If you need any further advice, please call our Technical Helpline on :-
020 8758 0338 (Mon-Fri)
16
Headphone socket
A 3.5mm Headphone Socket located on the top left hand corner of your
radio is provided for use with either headphones or an earpiece.
Inserting a plug automatically mutes the internal loudspeaker.
Display backlight
1. The display backlight will be switched on for approximately 12
seconds when any button is pressed.
2. When your radio is powered by AC mains the display backlight will
always be switched on.