We bought one of these for our outdoor cat. We put this pet warmer inside of her semi insulated cat house we built for her. We also installed a remote thermometer in there just to know how well the product worked. The temperatures in her house often stays in the 60's but even in most frigid hours of the morning (single digits temps) it usually stays in the upper 40's inside her house...a safe temp for even for young and old cats. So good job K&H. Oh and we also bought a very small outdoor model pad heater that sits under her water bowl outside of the house and its enough to keep the bowl from freezing even in single digit temps. Hopefully the small one is as outdoor compliant as its supposed to be because while it is generally covered by the porch it does get some snow and rain on it...and of course thereis a bowl of water on it at all times. Anyway thank again K&H...we sleep better knowing our kitty is suffering frost bite while we are cozy and warm inside.