Since installing a heater in our greenhouse, I had no way of knowing what the outdoor temperature was in winter. Therefore I purchased this product as an additional temperature sensor so I now know what the temperature is both outside and in the greenhouse. However as my wireless weather station is rather old (Oregon Scientific BAR113) I was struggling to find a compatible sensor as the one which was supplied at the time I bought the station has now been discontinued. This sensor works perfectly with my weather station and it has its own LCD display so I know what the temperature is when I'm in the greenhouse. It takes a reading every 30 seconds and transmits it wirelessly to the weather station. The only drawback I can find is the sensor is rather slow to respond to changes in temperature (it takes about 20 minutes to respond to significant changes in temperature), whereas the original one is almost instant.
Also note the Amazon Technical Specification for this product says the sensor takes 2 'AA' batteries. It actually takes 2 'AAA' batteries, of which some are supplied in the box.
Overall a very good product at a great price, and great service from the seller I bought it from.