Hi @tsr4proxy and thanks for your query. Unfortunately, the Tobii Dynavox I-12+ is not supported in the Unity SDK and indeed belongs to seperate business divisions.
I understand there is a specialised SDK which is available for the Dynavox but is targeted for interaction use only. For further details, please contact Dynavox Technical Support about this.
Apologies for any inconvenience, please do let us know if we can provide any additional information. Best Wishes.