No-touch Forehead Thermometer,infrared Forehead Thermometer For Adults And Kids, With Fever Alarm And Memory Function Fast and Easy Temperatures Readings You need to prepare 2 AAA batteries by yourself.Taking your familys temperature with this digital thermometer is as simple as pointing, and pressing a button. It uses infrared technology, and can show readings in Celsius or Fahrenheit. Very Accurate Readings: Our Forehead thermometer has been clinically tested and found to be a fast and absolutely reliable gadget to use. It is ideal for forehead readings, and have a very small error margin (0.1F for body mode, and 1.0F for ambient mode. It is actually more accurate than standard mercury thermometers. Multi-Mode Thermometer: The digital thermometer is designed for all ages, adults, infants and elders. It not only supports forehead function, but is able to take room/object temperature. and H are easily switchable.