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Double larger numbers: super easy to read. Our digits are as large as a quarter dollar, so twice the size of the average size. We have enlarged the screen size while omitting unimportant information. Other digital pool thermometers display 24.2 °C, our shows 24. Wide viewing angle: Equipped with two 45° vertical screens, it can be easily seen from most angles. Compared to the screen facing the sky, our screen has a greater visible distance, less reflection and you will not see the inverted digits. Rechargeable: One charge lasts 180 days. Save 8 AA batteries per year. Avoid water leaks by opening the seal frequently. Accurate and sensitive: Equipped with a high-precision sensor probe of the 3rd generation, updates the temperature data every 10 seconds. Accuracy: ±1.8℉/1℃ Telephone support and no leak promise: This product in US design has a 3-layer waterproof structure, 15 sealing screws and a 100% factory inspection. BALDR can guarantee you 3 years without leaks. Please do not hesitate to call our EU customer service centre. Operation: power on: press and hold the button for 2 seconds. Power off: tap button 3 times within one second. C/F switch: press button 5 seconds to switch C/F, wait 2 seconds for automatic confirmation.