Roberts Radio Gemini 21 RD-21 - Manual (Page 21)

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20
Headphone socket
A 3.5mm Headphone Socket located on the rear of your radio is provided
for use with either headphones or an earpiece. Inserting a plug automatically
mutes the internal loudspeaker.
IMPORTANT: Excessive sound pressure from earphones and headphones
can cause hearing loss.
Line out socket
A 3.5mm Line out socket located on the rear of your radio is provided
for connecting the audio signal to an external amplifier. Inserting a line out
audio cable will not mute the internal loudspeaker. Set the volume control
to minimum if desired.
Display backlight
1. When your radio is powered by batteries the display backlight will
be switched on for approximately 8 seconds when any button is
pressed.
2. When your radio is powered by AC mains the display backlight will
always be switched on when the radio is switched to on.