DescriptionThe OS499 Series are fully functional infrared non-contact temperature measuring devices and compatibility with Type K thermocouples. Unit has a very long battery life (typical 8 days), is obtained from 2 "AAA" batteries (included). The model with 30:1 field of view measures small and distant targets. Display backlight enables night and low light viewing. These features give the OS499 the versatility to meet most temperature measurement requirements.