an accessory item
accoutrement - accessory
The formal word ‘accoutrement’ refers to a supplementary item of clothing or equipment, or something needed for a particular activity or way of life. Most commonly used in its plural form. It is much more likely to be encountered in written English rather than in a conversation.
In his flat, Jack has all the accoutrements of modern life such as an HD TV, laptop, and games console.
When I visited that country on business, I discovered that a kettle wasn’t a standard accoutrement in the hotel rooms, so I had to make do without tea or coffee.
The visible accoutrements of status these days are not merely what you wear or drive, but rather how large your social media profiles are.