Comfortable design, reducing hand fatigue. The screen automatically displays a warning when the battery is low. It is mainly composed of an infrared sensor, circuit board, displaying components, and casing. High-resolution displays offer enhanced clarity. The bigger the glasses (or wider the aspect ratio), the more pixels you?ll be able to see. Easy to use. Just point and press the button and it reads the temperature so easily. Provides fast clinical accurate precise reading with less than 1 sec measurement time. The product can be reused.