Rectal Thermometers measure core body temperature through rectal insertion, the method the American Academy of Pediatrics rates as giving the most accurate reading, especially for infants under 3 months of age. A flexible probe tip bends during insertion for added safety and comfort, while a lubricated probe allows smooth placement. A clear readout shows results across a 35 to 42 °C (95 to 108 °F) range, spanning the hypothermia threshold to high fever. Single-button operation keeps handling simple for nurses, paediatric staff and caregivers. Typical uses include infant temperature checks, paediatric wards, neonatal care and clinical settings where core temperature accuracy matters.