Infrared digital thermometer. Switchable celsius/fahrenheit display. LED display screen. 9v battery operated. Inbuilt laser sight. Fast response .5 seconds. Weighs 138 grams. Battery included. The Chef Inox non-contact infrared thermometer measures the surface temperature of any given object. The unit’s optical sensors collect reflected transmitted and emitted energy information from the scanned object. The unit then translates this information into a temperature reading which is displayed on the unit’s LED screen. Temperature range: -42 to 550 degrees Celcius.