IR-866U Handheld Non Contact Infrared Thermometer Temperature Meter -50 - 2250℃(-58 - 4082℉) Condition: Item Type: Infrared Thermometer Material: Plastic Model: IR-866U Range: -50-2250°C / -58-4082°F Assumed Ambient Operating Temperature: 23-27°C (73-80°F) Accuracy: -50°C-0°C (-58°F-32°F): ±3°C (5.4°F) 0°C-500°C (32°F-932°F): 1.0%±1°C (1.8°F) 500°C-1000°C (932°F-1832°F): 1.5%±2°C (4°F) 1000 ° C Or More / 1832 °F : 2.0% ± 2 °C (4 ° F) Emissivity: Adjustable: 0.10-1.0 Optical Resolution: D: S = 50:1 Resolution: 0.1 °C (0.1 °F); 1 °C (1 °F) > 1000 Response Time: <250 Ms Spectral Response: 8-14um Polarity Display: Automatic display, "-" means negative, and positive is unsigned. Diode Laser: Output <1mW, 630-670nm, Level 2 (II) Auto Power Off: automatically shut down after 20 seconds of inactivity Operating Temperature: 0°C To 50°C / 32°F To 122°F Storage Temperature: -20 ° C To 60 ° C / -4 ° F To 140 ° F Relative Humidity: Work: 10-95% RH, Storage: <80% RH Power: 6F22 9V Battery (Battery Not Included) Weight: Approx. 1511g / 53.3oz