The Siemens part number 6AV6381-2BE07-5AX0 refers to the SIMATIC WinCC system software V7.5 SP2, RT 2048. It's a runtime software package that supports up to 2048 PowerTags and comes as a single license. The package includes:
Software and documentation on 3 DVDs
A USB flash drive with the license key
Multilingual support: German, English, French, Spanish, and Italian
Classification: Class A product (standard stock item)