Some basic questions about Ring security cam services

Hi, I am very interested in Ring services. I have some basic questions that I couldn't quite find a clear answer to on the main website:1) The cameras are wireless and connect to your home wireless router?2) Is footage continually uploaded to a server, or only if motion detection is activated?3) If an intruder breaks in and destroys a camera, all footage up to that moment is available for playback later?4) How do the cameras physically mount to the walls\ceilings?Thank you!