The Siemens 6AV6372-2DF70-0XX0 refers to the SIMATIC B.DATA V6.0 Enterprise Energy Data Management Power Pack. Here's what it offers

Function: Expands your system from 30,000 to 60,000 tags

License Type: Single license key on USB flash drive

Software/Docs: Not included

Packaging: 19.0 × 23.9 × 2.5 cm, approx. 0.201 kg

Compliance: RoHS compliant, WEEE take-back obligation applies

Lifecycle Status: Discontinued as of October 1, 2018, with no direct replacement

This was a high-capacity expansion pack for large-scale energy data environments, but since it’s no longer available, Siemens recommends contacting your local office for guidance on current alternatives.