✔Infrared Thermometer under Hospital Equipment category. ✔Power source is batteries ✔2pc AA Batteries ✔Responds in 500 milliseconds ✔Item description l*w*h 7.4*4*8 20.8 centimeters ✔Infrared thermometers are ideal for quickly detecting elevated body temperatures without contact ✔They have an accuracy variance of up to 0.3 Degrees C with 0.1 Celsius resolution ✔They have a quick response of upto 0.5 seconds ✔Measurement can be made from a distance of 1.9inch to 5.9 inch