A:AnswerNo - it doesn't. You can enable the alarm via Alexa, but you can't use the Show to see the video at this time (given the integration it could be a future enhancement).
A:AnswerYou can adjust the sensitivity on the camera. We have not had to adjust ours. I have gotten a few notifications for garbage trucks and larger vehicles. I live across the street from a school and there are a lot of vehicles. I do park my vehicle in my driveway so that may cut down on some of the notifications. I love my camera. It has really helped me feel more comfortable about what is happening outside my house.
A:Answer1-1/2 inches wide, 4-3/8 inches long and 1-3/16 inches deep. It also requires about 1/4 inch of clearance above the doorbell to be able to slide it onto the base. Note that the base does not add any additional depth.