# Reference: add-on packages for features
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Some features of Elemental Live require that you purchase an add-on package from AWS Elemental. This section includes tables that list the features and the audio and video codecs that require an add-on package.

**Topics**
+ [Purchasing and licensing an add-on package](ref-licenses-purchase.md)
+ [Elemental Live features that require an add-on package](ref-license-features.md)
+ [Add-on packages for video codecs](ref-license-codecs-video.md)
+ [Add-on packages for audio codecs](ref-license-codecs-audio.md)