This is the original Door Access Starter Kit. It includes:
• Access Hub
• Access Reader (Original)
• Access Reader Professional (Original)
• A bunch of UniFi access cards
The Access Hub is the same model in the current G2 product, it's only the two readers that have been updated in the G2.
You can read more about the UniFi Door Access system here: https://ui.com/us/door-access