ThermoWorks TW2 Mini Pocket Infrared Thermometer with Built-in laser targeting, from -67&deg;F to 482&deg;F, -55&deg;C to 250&deg;C MEASURING RANGE: -67F to 482F, -55C to 250C. IR ACCURACY: 2% of reading or 2C, whichever is greater. RESOLUTION: 0.1 to 199.9, 1 beyond. EMISSIVITY: default 0.95, adjustable 0.05 to 1 in 0.01 increments Distance/Target Ratio: 6:1 (1" target diameter at 6" distance) Switchable C or F, 2x CR2032 battery included. Each unit is calibrated at the factory using NIST traceable standards and a Certificate of Conformance is included. Shop around but read the specs closely! This is the absolute best value in a palm-sized IR thermometer. Professional 6:1 optics give you a 1" measurement spot at a 6" distance. Many pocket units today offer only 1:1 which means you have to be nearly touching the surface for an accurate reading. Comfortably fits your palm with the trigger button on the side. Simple mode button steps through Max, Min, C/F, and adjustable emissivity. If you want a pocket unit, don't settle for less!