Compact, rugged and easy to use. Just aim and push the button, read current surface temperatures in less than a second. Safely measure surface temperatures of hot, hazardous or hard-to-reach objects without contact. No battery included. D:S=12:1 38mm@ 300mm 75mm@ 900mm 132mm@1500mm Temperature Range: -32 to 300*C (-25.6 to 572*F) Accuracy: 25*C (77*F) to 300*C (572*F) + - 1.5*C or +- 1.5% : 0*C (32*F) to 25*C (77*F) +- 1.5*C or +- 1.5% : -32*C (-25.6*F) to 0*C (32*F) +-3*C Whichever is greater Repeatability: 1% of reading or 1*C Response Time: 500mSec, 95% response Spectral Response: 8-14 um Emissivity: pre-set 0.95 Ambient Operating Range: 0 to 40*C (32 to 104*F) Relative Humidity: 10-95% RH noncondensing, @ up to 30*C (86*F) Storage Temperature: -20 to 60*C (-4 to 140*F) without battery Weight/Dimensions: 130g; 146*80*38mm Power: 9v Alkaline or NiCd battery Battery Life (Alkaline): Laser models: 12 hours Distance to Spot Size: 12:1