The Siemens 6AV2105-4TT03-0AK0 is part of the SIMATIC WinCC RT Professional series. It is an upgrade package that transitions WinCC V7.0/V7.2 RT 262144 PowerTags to WinCC Runtime Professional 262144 PowerTags V13 SP2 in TIA Portal. This is a runtime software with a single license, and it comes with a software and license key download instead of a physical USB flash drive.