Optical Resolution D:S=12:1 Accuracy -500(-5832): ±4/9; Above 0(32):±2% ±2 Emissivity fixed at 0.95 Response Time 1s Alarm Alarm Resolution 0.1 Spectral Response: 814um Temp. Conditions Operating : 0 to 50 / 32 to 122 Storage: -20 to 60 / -4 to 140 Humidity Conditions Operating:1095%RH; Storage: <80%RH Power Supply one 9V battery Dimensions(L*W*H) 134*88.5*36mm Weight 105g Built-in laser pointer Overrange indication User Selectable Units Backlit LCD display Data Hold Auto power off LCD size:1.2 inch LCD colour:white battery:330mAh work away:22hours Dimensions(H*W*D): 134*89*36mm Weight: 185g pack Size(H*W*D):200*135*60mm Accessories: User's manual 9V battery blister card and clamshell.