The phrase "an extra feature of" is correct and usable in written English.
It can be used when describing an additional characteristic or functionality of something, often in a technical or descriptive context.
Example: "The new software update includes an extra feature of enhanced security protocols to protect user data."
Alternatives: "an additional aspect of" or "a supplementary element of".
X-ray photoelectron spectroscopy (XPS) spectra of sputter-etched nc-TiC/a-C nanocomposite thin films published in literature show an extra feature of unknown origin in the C1s region.
Sling executives say that in addition to continuing the Slingbox line, EchoStar plans on building in Sling's place-shifting technology as an extra feature of some of EchoStar's line of set-top boxes.
An extra feature of TreeVector is a script which allows specific names to be extracted from the topology and displayed on their own, using the relationships taken from the parent tree topology.
"Life Remote Control" also appears as an extra feature on the recently released DVD of "Exit Through the Gift Shop," but Mr. Levy's name does not turn up in the credits.
Note any extra features of the auto part.
Acer may be able to pitch the inclusion of Android as an extra feature instead of positioning it as a primary operating system at first.
We have in our stylometric implementation included a subset of the features used in the article by Narayanan et al. [5] plus an extra feature: the relative frequency of various smileys.
One extra feature of the ICMAP algorithm is the classification of a reaction regarding the reaction centres indentified using a 15 digit numeric code.
The most commonly used extra feature of the dashboard was the option to delete the display of information about individual treatment options which was utilized by 14 (56%) participants.
Stitched into a new format and given the extra features of activism and admonishment, the evening often felt like the Franken-Oscars, a whole different sort of creature that no one could quite control.
Although it lacks the extra features of expensive models, it's more than competent.
