I have one. My friends call it my "drone". It runs silent... You have to be at least 1ft away before you can hear it. The body frame is interchangeable to sky blue or night black. It runs a camera that can both record & broadcast live feed, with HD night vision. Its also water resistant. Max speed in a straight "bee line" is 15 Mph. Has a small mini shoot should it experience failure in mid air (for soft landing).
I started out with the base model and have slowly been "tweaking" it for the last 2 or 3 years. If could get my hands on some emerson at a very low price (not bloodly likely in this lifetime), it would live up to its nick name.
Again those rings are all connected and mine are not. The rings can also move. Mine also has a bigger body.
^^ Something like this, but not as big and minus the gun of course (and mine is silent). Of course I think the video of this one maybe a fake. But the design is similar to mine & so I'm using it as an example.