This is my second Nexx garage door controller and it is apparently a newer generation. The door position sensor is wireless and extremely easy to install compared to the original two piece wired one. If you can peel some double side foam tape and stick the door sensor on the door and the WiFi door controller on the side of your opener and connect two wires you shouldn't have any trouble installing this on a compatible door opener. Both of my openers are two different models made by Genie and they are several years old.
Once physically installed, all you need to do is install the Nexx app on your phone and follow the instructions to connect the Nexx controller to your WiFi network.