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.