Here is a thread about the new ADC doorbell which will be out soon. No ETA yet, but it is expected very soon.
It will have a superior build quality all around and will use Alarm.com analytics.
It will still require being wired to power of course.
5ghz is unlikely (I think it will just be 2.4), but I would recommend against it even if supported. The overall range and penetration of 5ghz is generally very problematic for an outdoor wifi device. Individual cases may vary.