Recently there is a requirement : CSR8675 module for bluetooth earphone with16Mbit flash +external 32Mbit flash.
The most recommend module is FSC-BT806
FSC-BT806 Main Features:
Bluetooth 5.0 dual mode
CSR 8670/8675 options
Internal FLASH capacity:16Mbit flash
If your bluetooth headset do not have limited about module's size .
Then FSC-BT806 is okay ,it with 16Mbit flash internal flash ,the standard module do not have 32Mbit external flash,but FSC-BT806 module has enough space to add 32Mbit external flash.
For more details ,feel free to Contact Feasycom .