After pulling my Speedster out of the garage it has always been a nuisance to have to get out and go back into the garage to shut the garage door.
I suppose I could have bought a battery for the 30-year-old remote but I didn't want it cluttering up the inside of the Speedster.
I found a phone app and receiver to add to your door opener that works with almost any opener from the last 50 years.
It is easy to install. Connect 2 wires and plug it in. Now I just press a button on my phone screen and the door opens. It works with iPhones and Android phones and costs a bit over $50.