bells and whistles
- (idiomatic) Extra features added for show rather than function; fancy additions or features.
- Synonyms: gadgetry, trivialities
- Antonyms: plain, no-frills, normal, ordinary, simple, unadorned
His new car has all the bells and whistles, but it doesn't move through traffic jams any faster.
The bells and whistles do not impress me.
I need a new phone, but I don’t want all those fancy bells and whistles on it!
extra features added for show rather than function