R8000P Cannot complete setup

I have Winodws 10 Pro 64--bit with Mozilla--Firefox as the browser and Verizon as internet service provider using Ellipsis Jetpack MHS900L that can be seen at http://www.verizon.com/internet-devices. It is the one in the middle of two other jetpacks. It is wireless. What or how is Double--NAT going to assist  me in seeting up the router ?  Am I going to be able to setup this router to access the internet ? If yes, how ?  Mutiple devices can connect via wireless to the JetPack ? I have never seen, or heard about, a wireless jetpack with their own intergrated router. Where and when did you see such an item ?  Thank you.