The Bluetooth stereo audio channels are sent by the mixer to a stream via mixer output channels bA and bB.
For example stream b1might be sent bA+bB giving b1
a STEREO signal or the signal might be assigned to b2.
Or stream b1 might be sent bA and stream b2
might be sent bB giving each channel a MONO signal.
OR
If Audio-Tee=TRUE in NVR Settings Memory then
The stream b1 is sent bA+bB & The stream b2 is
sent LCO+R CO.
External Bluetooth Keyboards require data stored in the
NVR settings memory to customize for the specific Bluetooth keyboard.
A helper program you run on your PC creates the data necessary.
The Remote Joystick Adapter is a small box with two joystick ports and Bluetooth connection capability great for playing games on the couch.