Originally Posted by sharlan:
Have you considered a wireless door bell?
We used to have one that had one part at the front door and I carried the other part out to the backyard with me.
I need to go to Lowes and get another one before summer.
You can also talk through them so you can easily say
"Hang on a minute, I'll be right there"
Try
Ring
You can visually see and reply via your smart phone