The Aquatopia Safety Bath Time Audible Thermometer floats about the tub to delight baby and provide alerts when the water temperature deviates from a comfortable range. With a sensor that activates instantly in the water, the thermometer sounds an alarm if the temperature is above or below the recommended range of 89.6 - 100.4°F (32 - 38°C) for sensitive young skin. Features Friendly turtle design A sweet sea turtle with cute spots is ready to make a splash in baby's bath and ride the waves on a brightly colored raft. Large digital display A sensor activates instantly in the water and displays the temperature on a large, easy-to-read digital display for quick reference. Safety first A child-proof battery compartment resists curious fingers, and a low battery warning flash is carefully designed to help ensure that bath time remains safe and comfortable for baby at all times. Easy unit conversion The water temperature is measured every 2 seconds and shown clearly on the display in both °C and °F. Document Links Instruction Manual Product Description Make bath time safe time! The easy to use Safety Bath Time Audible Thermometer eliminates hazardous guesswork by constantly and accurately measuring the bath water temperature every 2 seconds. It alerts you with an audible alarm if the water is too hot, above 100.4F, and another alarm if the water is too cold, below 89.6F. Battery powered and water activated, this clever alarm automatically activates when placed in water and de-activates when taken out. Also makes a great bath toy! Fully tested to meet all necessary safety standards.