Chamberlain smart garage controller. Turn your garage opener in to a "smart" opener so you can tell if the garage door is open or closed, be reminded it's open or find out when it was opened or closed. Check your phone on those days where you can't just remember if you closed the garage before you left because you were rushing. Or need to let a kid or relative or friend in to grab something while you aren't home? Well you can do all that from the convenience of your phone and not drive all the way home. Or with all the added package thief's out there, Amazon has a specific service for this directly in works with this unit. You enroll and they will leave your packages in the garage when you aren't home, if you so choose to sign up for that. You don't even have to do anything. I moved in to a new house and bought this for it but as i was hooking it up, i realized my opener is basically a "smart" unit & I didn't need this 😆 haha... Designed to work with mostly all model openers after 1993 but you can check this site to check directly. Just go here or scan the QR code in my last pic. https://support.chamberlaingroup.com/s/article/garage-door-openers-compatible-with-smart-garage-control