The Siemens 6AV2104-2DF05-0BD0 is SIMATIC WinCC Runtime Advanced Powerpack 512 PowerTags  2048 PowerTags V15, a runtime software in the TIA Portal. Here are its details:

License Type: Single License

Supported Versions: V15 (without version change)

Functionality: Expands the number of PowerTags from 512 to 2048

Delivery: License key on USB flash drive (no software or documentation included)

Product Lifecycle: Discontinued since October 1, 2021 (no longer available)

Compliance: RoHS directive compliant