OS880-series handheld infrared thermometer is a non-contact temperature sensing thermometer. It measures from -30 to 550°C (-22 to 1022°F). This thermometer features a backlit display which is automatically illuminated when the trigger is pulled and allows working in poor or zero-lighting conditions. The single laser is also automatically active when the trigger is pulled. The meter constantly updates the temperature measurement as long as the trigger is held in and will "hold" on the last temperature seen when the trigger is released. The OS880-Series has adjustable emissivity, minimum value, maximum value, and averaging functions, as well as high and low alarm capability. This safely measures surface temperatures of hot, hazardous or hard-to-reach objects without contact.