Hi Chelsea
It’s just a normal Chime (not pro with built in extender), plus the chime included in the Doorbell Pro kit.
I’m not 100% sure but as they were bought on Amazon less than 1 week ago I’d say 2nd gen.
BTW on closer inspection I did see some plastic covering the included chime (but not on the additional Chime) and they sound only medium loudness.
Regards,