Free the french internet provider worked jointly with Devialet to create the Freebox Delta, a box internet available exclusively in France.
If you want to catch up more details on specificity of the produit, please have a look at the Free web site here
This Freebox is a product made by Free, and won't be compatible in Stéréo with other Devialet Product via its regular application (Devialet, Devialet Remote or Devialet Spark). However your TV can still provide your Devialet product a sound signal via the optical output.
About the customer care, our internal team can't provide you all detail about the Freebox Delta, Free are owning this part in full, so in case of questions we recommend you to reach out their Free customer services here.