Devices with Bluetooth functionality have specific Bluetooth Firmware. 

To upgrade the Bluetooth firmware, select your device in OEM Server/Device and go to Device Operations >> set Bluetooth Firmware. Then choose your Hardware Revision Number. 

Note: The Revision Number is the number after the decimal place in the Product column in OEM Server.  e.g. 62.2 - indicates 62 = Device (Remora2), .2 - Rev2.

 Select the latest Bluetooth Firmware release.

And click update.

NB only 1 hardware revision can be updated at once.

See Bulk FW Update for information on how to update multiple revisions.