The Klein Tools IR07 is a dual IR (infrared) thermometer and probe thermometer. This rugged pocket thermometer measures temperature from -40 to 572-Degrees Fahrenheit (-40 to 300-Degrees Celsius) for both IR and probe measurements. The IR thermometer has a Distance-to-Spot ratio of 8:1 and the target laser can also be used as a laser pointer. The Probe accurately measures air, liquid and surface temps and has a convenient hook for hands free indoor measurements. The IR07 quickly calculates differential temperature (T1-T2) and has a backlit LCD for easy viewing in low light. Features: Capable of measuring temperature from -40 to 572 Degrees Fahrenheit (-40 to 300 Degrees Celsius); Accurately measure surface temperature with Infrared Thermometer (DS ratio 8:1); Measure air vents and duct temperatures using temperature probe with hands-free hanging hook; Temperature probe also can measure liquid temperatures; Not a medical device; thermometer is NOT intended for use on people or animals.; Target laser may be used as a laser pointer; Quickly calculates differential temperature (T1-T2) for both IR and probe temperatures; Easy-open probe with nub to prevent temperature transfer while opening; Backlit display with Hold, Max/Min, APO, and Low Battery functions; Includes a pouch, owner.s manual, and 2 x AAA batteries; Stainless steel probe is FDA GRAS compliant; Certified to IEC EN 61326-1:2013; EN61326-2-3:2013; Pocket Sized, IR and Probe Thermometer; Hanging Hook for Use with Air Vents; Capable of measuring temperature from -40 to 572 Degrees Fahrenheit (-40 to 400 Degrees Celsius) - Warnings: Thermometer is NOT intended for use on people or animals.; Read, understand and follow all instructions, cautions and warnings attached to and/or packed with all test and measurement devices before each use.; Do not direct laser beam into eyes, as this can cause permanent eye damage.