Measurement Range: -60 to 550Deg C (-76 to 1022Deg F) Operating Range: 0 to 50Deg C (32 to 122Deg F) Accuracy, (Tobj=15-35Deg C,Tamb=25Deg C): ±1.5Deg C (2.7Deg F) Accuracy, (Tamb=23 ±3Deg C): Tobj=0 to 550Deg C: ±2% of reading or 2DegC (4Deg F) whichever is greater; Tobj=-60 to 0° C: ±(2° C+0.05° C) Emissivity: 0.95 default - adjustable 0.1 to 1 step .01 Resolution (-9.9 to 199.9° C): 0.1° C/0.1° F, otherwise 1° C/1° F Response Time (90%): 1 sec Distance to Spot: 12:1 Battery Life: Typ. 18, min. 14 hours continuous use Dimensions: 112.58 x 147.93 x 41.36mm (4.43 x 5.82 x 1.63) Weight: 145 grams (5.1 oz.) including batteries (AAA 2 pcs) .