This forehead thermometer has infrared technology to measure forehead or surface temperature at the push of a button. The thermometer has a blue back light for low light conditions and features an auto-off after 1 minute. Memory recalls up to 25 readings with 1-second response time. 1.5" measurement distance. LCD Display Size 1.85" W x 0.71". Additionally, (2) 1.5V AAA IEC LR03 alkaline batteries are included. ABS plastic.