Measuring Range: -50°C to 550°C / -58°F to 1022°F Accuracy: +/-2% or 2°C Distance Spot Ratio: 12:1 Emissivity: 0.1 to 1.0 Response Time & Wavelength: 500ms &(8-14)um Repeatability: ±1% or ±1°C Resolution: 0.1°C or 0.1°F Storage Temperature: -20°C to 50°C( -4-122°F) Operating Temperature: 0 to 50°C(32-122°F) Power: 1pcs x 9V DC Battery High/Low Temperature Alarm Setup, Min/Max/Avg/Dif Temperature Measurement, Data Storage, °C/°F Selection, Data Hold Function and Laser Target Pointer Selection (Two Laser, Backlight Display Selection, Auto Power Shut Off and Low Battery Indication.