Here’s a brief description of the 6AV2101-2AA04-0BD5 from Siemens:

• Product Type: SIMATIC WinCC Comfort Powerpack (Upgrade from WinCC Basic to WinCC Comfort V14).
• Manufacturer: Siemens.
• License Type: Floating License.
• Contents: Software and documentation on DVD, with a license key on a USB flash drive.
• Compatibility: Only valid for 6AV2100-0AA04-0AA5 or 6AV2100-0AA04-0AH5.
• Status: This product is discontinued, with a successor available (6AV2101-2AA00-0BJ5).
• Stock Availability: Limited availability from select distributors.
• Pricing: Varies by distributor and condition (new, surplus, refurbished).
• Shipping: Worldwide express delivery available.