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After installation, the firmware shows "LMP 9.25805". So, it's actually a Bluetooth 5.0 adapter, not a 5.1 adapter. I've tried to: 1. Install the driver from the CD; 2. Install the driver from the USB disk; 3. Install the driver downloaded from the Website. 4. Enable/Disable/Reboot...etc Is there a way to update the firmware (I don't think so, but, what am I missing?)? The item is not as described by Amazon. I may have to return it if it's not a 5.1 adapter. If anyone has any ideas, please let me know. Thank you very much.