gLink is a good add-on device to upgrade your old garage opener to be smart, controlled by your smartphones. gLink co-exists with the current system you used and you can use the remote as well if you want. Open/Close the garage door: Very fast response and easy to use. Turn the light on/off, the only product in the market to turn on/off the light inside the major garage openers. Supports up to 10 permanent users: every family members can use smartphone control the garage easily. It’s also good for bike-man and user who forget to bring the key. Easy to activate the App, no need to remember any password/code. gLink supports most garage openers in the market except one with MyQ marked (Chamberlain/Liftmaster) and series-3 wall console (Genie). Only two wires connected to the garage opener without power supply for most garage openers. One App allow you to control more gLinks/garage-doors even in different location. It’s good for the people to own multi-houses.