The screen is large and bright, all the declared functions work. There are four measurement modes-adult, child, measurement in the ear, measurement of surrounding objects.The beep can be turned off. There is a color alarm on the screen . Remembers the device 40 latest temperature changes. Powered by two small finger batteries. Auto Power off after 10-12 seconds. What else do you need from a non-contact thermometer, Great Product, I recommend it, Thank you! Multisiv.