bells and whistles ( synonym found)
Definition of bells and whistles:

°Extra features added for show rather than function; fancy additions or features.
"His new car has all the bells and whistles, but it doesn't move through traffic jams any faster."
Definition of bells and whistles:

°Extra features added for show rather than function; fancy additions or features.
"His new car has all the bells and whistles, but it doesn't move through traffic jams any faster."
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