My teeth are normally white. I am presuming you are referring to the DJI RC2(Smart controller with TFT screen), in which all the bluetooth really does is file transfer(for android devices), and for audio in headphones.
I made a Bluetooth connection with
- a Bose soundlink system
-a Lg 75" led Tv - Denon dolby atmos amplifier
Sound is redirected from the Rc2 to the external bluetooth device.
Bluetooth can also be used for Internet Tethering with mobile device. So you don't have to set Wireless Acces Point on phone. That's what I do, the less wifi interference is a bonus