Wearable underarm thermometers. Continuously monitors temperature. Can check temperature while baby sleeps. Accurate - used by hospitals worldwide. Ages: Birth+. Pediatrician approved. Vicks Wearable Thermometers are: Accurate: +/- 0.2 degrees F. Gentle: Safe, gentle, medical-grade adhesive is latex-free, hypoallergenic and meets FDA requirements. Convenient: Easy to carry in a tote bag, handbag, first aid kit, anywhere!