SonicProtect for TZ500 FAMILY (TZ500, TZ500W) for 5 Years Equivalent of AGSS.
This is a subscription, and the licence extends your current TZ500 or TZ500W appliance so you can later purchase one of the SonicWall TZ500 Family (Gen 7 TZ570 or next-gen equivalent - possibly called the TZ580?) via the Secure Upgrade (Appliance Only) with no Attached Subscription (Existing SonicWall Customers Only).
The TZ500 & TZ500W go End of Support on 1th April 2026, so you would need to upgrade the hardware before then.
More information: SonicProtect Subscription | SonicWall