Is there a device that can alert an elderly person they got a text or call?

My FIL is very old. He never, ever has his phone with him. In fact, he leaves it on the charger - why? He says it’s better that way.., anyway, I was wondering if there is an auxiliary device that we could put in his living room and kitchen that would light up and stay lit (very visibly) when he gets a text/call/message? He and his wife won’t have an Alexa in their home so that’s not an option. Thanks for any ideas. I googled it but don’t really know what would work. They live far from us and we worry when we can’t reach them.