For use with Craftsman 54915, 54918, 54930, 54985 and 54990 garage door openers Open, close and monitor your Craftsman AssureLink garage door opener with your smartphone Installs within minutes by connecting to your internet router Communicates wirelessly with the garage door opener in your garage Receive automated alerts when your garage door is open Never worry about an open garage door again with the Craftsman connectivity hub. This device connects to the internet through your home WiFi router and when combined with Assure Link compatible garage door openers, allows you to open, close and monitor your garage door from anywhere via a smartphone, tablet or computer with an internet connection. No more worrying if you forgot to close your garage door or open the door for family, friends or deliveries with this connectivity hub.