This thermometer has an LED display, and it uses infrared technology to measure forehead, object and ambient (air) temperatures in a three second response time. You can also measure a child's temperature without waking them. There are three measurement modes for greater versatility, and it comes with 2 AAA batteries. The ring around the measurement button turns red when your temperature is above 100.4 degrees Fahrenheit, and it turns green if there is no fever present. Manufactured by Mabis Healthcare.