Features > Non-touch / contact-less, sleek design > Infrared sensor based measurement of body temperature > Multi function 2-in-1 can measure temperature on ear/forehead > Multiple colors and backlight display: White, Green, Orange and Red to alert different temperatures > 9 sets of memory values > The switch of degree Fahrenheit â?? and degree Celsius �°C > Instant measurement of temperature within 1 second > The design is convenient and economical without earmuff, requires just a clean swab to remove dust or particles from the sensor tip > It has the function of sound alert which can be set on/off > The machine idle time of 30 seconds, turns off power automatically saving battery power > 2 x AAA battery operated device