Amazon.com.au:Customer reviews: Blufree Floating Pool Thermometer, Swimming Pool Thermometer with String, Floating Water Thermometer for Swimming Pool, Bath Water, Spas, Hot Tubs, Aquariums & Ponds (Gold Fish)
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It is essentially a thermometer leveraging decades old technology to tell you what the temperature is of its surroundings. It does that, as does every other thermometer. So no objections, but no kudos either as this is a pretty basic function.