Welch Allyn the reliable brand for diagnostics. Infrared sensor reads temperature from center of forehead. Has a 60 second pulse timer, memory recall button, C/F scale conversion button and backlit LCD display. Requires 2 AAA batteries (there are some included but can’t guarantee how long they will last). Please note this model is now discontinued. I purchased mine at the exact same time as this one and it’s still working perfectly. Box opened just to take photo. Never used.