DESC: The one-piece constructed orthodontic nipple measures most temperatures within approxomately 90 seconds. Self-contained, non-replaceable battery is sealed for added safety. Clinical accuracy Memory recall of last reading Waterproof design for easy cleaning This soothing method is a great alternative to rectal thermometers. Is phthalate free and conforms to the safety requirements of the U.S. Consumer Products Safety Commission for pacifiers. Lullaby fever alarm indicating temperatures above 99.5F Continuous monitoring with automatic shut-off after approximately 25 minutesIncludes: Storage cover Detailed guidebook in English and Spanish One-year limited warranty