Infrared Thermometer Gun Digital Display Handheld Non Contact Temperature Tester for Industry Item Type: Infrared Thermometer Gun Battery: 1 x 6F22 9V, shipped without battery. Model: TM750A Temperature: -20℃ ~ 750℃, that is, -4℉ ~ 1382℉. Laser Points: Circular Multipoint Geometric Correction: >400℃ Environmental Temperature: 23°℃+2°℃. ≥ 0℃: ± 1℃ or reading ± 1%, take the larger value. ≥ 32℉: ± 2℉ or reading ± 1%, take the larger value. ≥ -10℃ ~ 0℃: ±2℃. ≥ 14℉ ~ < 32℉: +4℉. ≤ -10℃: ± 3℃. < 14℉: ± 6℉. Response Time: <300 Milliseconds Working Temperature: 0-50 ℃, that is, 32-122℉. Storage Temperature: -20 ~ 60℃, that is, -4 ~ 140℉, without battery. Working Humidity: 10%~90%RH, non condensing, ≤ 30℃, that is, 86℉. Working Altitude: 2000m Storage Altitude: 12000m Automatic Shutdown: About 5 Seconds Sampling Rate: ≤ 0.5 Seconds Backlight Function: Yes Low Battery Display: Yes Data Retention Function: Yes Maximum, Minimum, Average, Temperature Difference Function: Yes High and Low Temperature Alarm Function: Yes 0 Setting Function: Yes Maximum Display: Yes Power Consumption: ± 50W