Sony Bravia Theatre 4U won't connect to PlayStation 4

[Dreamtfan]

I recently purchased the Sony Bravia Theatre 4U neckband speaker and wanted to connect it to my Sony PlayStation 4, but I'm getting a comment that this device isn't supported by PS4

 I'm running the latest version of the software. I know it's compatible with PS5 but I find it really bizarre that it's not backwards compatible? Can anyone help me with this?

[EMS_MO72]

Hey @Dreamtfan 

Could you confirm the full model of the neckband to check this for you?