@Jean118 We have two small battery operated clocks on the bedside tables. I think they were $12 each from Walmart.
My dad is 82 and still travels extensively both here and abroad. He has no cell phone to use as an alarm. When outfitting the AirBnB, I kept him in mind...someone who is a traveler but doesn't/can't get bogged down in too much technology without getting frustrated or confused. So, we have a simple Melitta pour-over with paper filters and ground coffee, we have the battery operated alarm clocks, a simple thermostat with up/down arrows that won't intimidate, and we use a simple combo lock with keys inside instead of a smart lock.