The Chamberlain myQ Smart Garage Door opener consists of a ceiling-mounted hub — claimed to connect to nearly every electronic opener built since 1993 — that you plug into a nearby power source. The accompanying wireless electronic sensor that mounts on the inside of your garage door sends a message to your smart phone (via the downloadable app) indicating your door’s opened/closed status in real time. A guest feature allows up to three other phones to access the opener. The Chamberlain myQ system sells for about $50 from www.amazon.com.
