This is the same external GPS antenna supplied with the second-generation AiM SmartyCam (Part No. MC-540) between 2009 and 2013. If your antenna has been damaged, or if you just want to use your SmartyCam in two cars, you need an extra antenna! No setup required. Simply plug it into the camera, and it automatically does the rest.
The second-generation SmartyCam can be identified by the two round plugs on the back panel. The first-generation SmartyCam, with just one round plug, does not use an external GPS antenna. The SmartyCam HD uses a different GPS receiver.