From Fridababy, this 3 in 1 True Thermometer features: 3-in-1 True Temp Thermometer for rectal, oral, or armpit Get a quick reading of baby's temp in just 10 seconds Don't second guess with this double-check 30 second reading without reinserting Can be used orally, under the armpit or rectally Digital backlit screen and LED light helps makes nighttime checks a breeze Stopper keeps thermometer from being inserted too far into the rectum Imported.