One-button measurement, easy to operate. Measuring the forehead of the human body, not touching human skin. Equipped with 2 sections of 7th battery (not included), can be used more than 100,000 times, product life > 3 million times 6. It can be adapted within 5~15CM, no need to fix the measuring distance. Large-screen LCD display, white back-light, any light can be clearly displayed.