It is made primarily for head/tail light display and control. My Edge 130 "establishes a network" when I turn it and the radar on. However, the 130 is rather primitive; the only thing it displays is the battery level for the radar (and of course the radar signals themselves). On higher-level Edges, I think it allows control of various lights through one of the optional downloadable "apps." I was thinking of getting those little Bontrager lights so I could geek out with a light network, but then I discovered the only thing the Edge would do is tell me they were on or off.

So, unless your watch allows you to download and implement the same sorts of apps, I suspect it is limited to Edge units.