Taking a forehead temperature is as simple as pointing and pressing a button. Measure body temperature 32?C to 42.9?C (89.6?F to 109.2?F) and object temperature 0?C to 180?C (32?F to 244.4?F). Response time less than half a second . Measuring distance is 3 to 5cm. Requires 2 "AAA" batteries (not included).