The other thing you can do is to add some additional features.

Additional features were added to the park throughout the years.

I think it's likely that we will see additional features of a similar nature added in the future.

After all, it's just an additional feature on a mp3-player.

There are several additional features which will be available shortly.

There are a couple additional features which you get with registration.

New models with additional features appeared every few months rather than years apart.

To it I would add a couple of additional features.

There's a good free version, and a buck a month you get some additional features.

Value added is offering additional features with goods or services.