Each Tailwind iQ3 module can control and monitor up to 3 garage doors. It ships with 1 garage door wiring kit. To control more doors, just add the appropriate number of door kits to your order. So, for example, if you have a 2 car garage you will want to order 1 additional door kit. If you have a 3 car garage you will want to order 2 additional door kits.
You can have many Tailwind controllers on your account, or shared with you by others. Each controller's access and notification preferences can be set individually, giving you maximum flexibility and control.