I bought this item thinking it would be the perfect indoor outdoor thermometer, but I was way off! First, it would not recognize the remote temp at all. After trying several batteries and pushing the reset buttons they did find each other. One night outside though and again, it was lost. It seems the two could not be more than 15 or 20 feet apart or they did not share the signals. Even then, it was hit or miss. I was truly dissappointed and sent it back for a refund. Too bad they don't pay for the shipping, so I lost money and got my temperature up! Don't waste your time on such electronic thermometer devices if you live in a snowy cold area like we do. The batteries will not last outside in the cold and you too will be the only thing heating up! I hope this was helpful.