Not at the beginning. We are still looking into the topic and will let you know here in the forum when we have a clear answer.
Noise is very subjective, depends a lot on the door and surrounding. Furthermore how “loud” you experience your Smart Lock does more depend on how long you hear the noise than the absolute volume it has and how regular it is (stiff doors are much louder than ones with regular load on the gearings). Having said that i would rate it more at 10% rather than 50%. All tester so far said that it sounds more pleasant.
Both have changes, but they are not exactly the same.
Yes. Battery life will be longer in this case (~6 months).
Yes, but you need a battery compartment. 3.0 Pro comes with Power Pack only.
But it’s not advised. Accumulators have a higher energy density than Alkaline batteries, can deal better with high forces and cold temperatures and are more environmental friendly.
The door sensor is compatible with Smart Lock 3.0 & 3.0 Pro and not backwards compatible with Smart Lock 1.0 & 2.0.
See above. Currently only by connecting it to a bridge.