Non-contact thermometer, good up to 3-5 cm distance. Measures instantly. Can easily switch between Celsius and Fahrenheit. Measurement accuracy within 0.2°C to 1.3°C (32.36°F to 32.54°F). Comes with a high fever alarm; 5 beeps in case of a temperature higher than 38°C (100.4°F). Requires 2 AAA batteries.