?Easy to Get Started?: BabyElf Tub Thermometer will automatically start after being put in water, and will automatically shut down after 1 minute when it is dry. The intelligent automatic shutdown function can extend battery life. Two spare batteries are included. Tips: The battery cover has a silicone waterproof ring. Please make sure to tighten it when replacing the battery to prevent water from entering. ?Superior Safe Quality?: Made of BPA-free safe material, BabyElf Water Thermometer is exquisite in workmanship, and the smooth and burr-free surface will not hurt your baby's delicate skin. It is an ideal size for your baby to hold and interact with. It is not only a bath thermometer, but also a cute bath and swimming pool floating toy. It is baby essentials and an ideal gift for newborn baby. ?Versatile?: BabyElf Water Temperature Thermometer can be simply switched between ? and ? according to your needs. After the thermometer is put in the water, it will automatically start the timing function, allowing you to know how long your baby has been bathing without worrying about catching a cold. ?High & Low Temperature Alarm?: When the water is too hot (above 102.2 ?) or too cold (below 96.8 ?), Baby Bath Thermometer will beep and the LED screen will flash red/ blue warning light. Let you know the temperature change in time, ensure a safe water temperature, and make your baby feel comfortable at all times. ?Reliable & Accurate?: BabyElf Digital Thermometer is not only a bath thermometer, but also a room thermometer. No more touching or guessing, the large and clear LCD screen will provide you with an accurate temperature within a few seconds, ensuring that the bathtub or bedroom will not be too hot or too cold, bringing the baby a comfortable environment for sleeping and bathing.