"Optional features" refers to additional functionalities or components of something that are not essential or mandatory, but can be chosen and added based on personal preference or need. Full definition
You can also see pricing information and examples of optional features available for each video resume package by clicking the link next to each package. (cnvideoresumes.com)
A power moonroof, a rear spoiler, and chrome wheels remain available as optional features. (automotive.com)
The automakers provided information about the presence of optional features on specific vehicles by vehicle identification number (VIN). (iihs.org)