The temperature doesn't update for hours

Great idea and easy to use BUT the temperature doesn't update for 6 hours. My elderly father cannot see so has to rely on talking products now. His home gets hot when outside summer temps go up, so he needs something that'll tell him the CURRENT temperature now so he can turn on the a/c if it's too hot inside his place. I bought a different talking temperature product from Amazon at the same time I got this one - one for each room. The other type registers temperature changes normally, like all temperature gauges, but this one can take 6 hours to register a change. It was 86 in his home and the other temperature gauge said 86, but this one still said 79, like it was 4 hrs earlier. By the next morning however, it was accurate. It just doesn't register current temperature if it's been changing. So I'm returning it and getting another of the other talking temperature unit.

###

