In the engineering menu (OnStandby: info, menu, mute, power) turned on BT output. An option appeared in the sound menu "sound output via BT", it seems like the search for devices also appeared, only, as I understand it, there is no hardware. I understand that this is a modular device, and most likely it simply does not exist, although it costs, as everyone understands, the conditional 3 bucks.
Before you take off the lid, is there any experience with the masters of such implementations? And maybe someone in Altai has this device?