The GoControl controller is a small box that you connect to the existing garage door operator’s pushbutton terminals (like a regular garage door opener wall switch) via a pair of wires. It comes with a power adapter and a battery-powered tilt sensor that you attach to the garage door (this allows the system to detect the door’s position). The controller has a light and siren that are activated as a safety warning five seconds before an open or close command is issued.
Installation is trivial and introducing it to the Z-Wave controller is equally simple (it also acts as a full Z-Wave node meaning that it also relays Z-Wave messages for other devices ensuring that your Z-Wave system has the greatest possible physical reach).
Read more: http://www.networkworld.com/article/2893665/infrastructure-management/home-automation-top-marks-for-nortek-gocontrol-garage-door-controller.html