These work great, if the garage is on the same electrical panel. My shop is about 150 ft away and had a separate meter. I'm gonna use a ptp (point to point) link. You need two. One plugs into the router, and then sits on the outside of the house. The other goes where you want the signal, again on the outside. As long as you have line of sight between the two points, the signal can travel well beyond a mile. The pieces then work as a wireless access point.
