measurement ET-955 Digital Anemometer Professional Handheld Thermometer Wind Speed Meter 0.3m/S - 45.0m/S Specification: Condition: 100% Brand New Item Type: Anemometer Material: ABS Air speed range 0.3m/s - 45.0m/s Air speed accuracy ??3% of reading?0.2? Temperature range -30 degrees Celsius -60 degrees Celsius / -22?-140? Temperature accuracy ?1.5 degrees Celsius (?2.7?) Area set 0.001 -9999 ??0.001- 9999ft?) Display 4 digits LCD display Resolution m/s:0.01, km/h:0.1, ft/min:1, knots:0.1 mph:0.1, cmm:0.001, cfm:0.001 Sampling time 1time/second Operation Temperature -10 degrees Celsius -60 degrees Celsius /14?-140? Operating Humidity Less than or equal to 90?RH?Non-condensation? Storage Temperature -10 degrees Celsius -60 degrees Celsius /14?-140? Storage humidity <80%RH Air speed level indication level 1-12 by analog bar-graph, level 12 above by digits Measurement average average reading of the latest 30 records Maximum / Minimum Maximum / Minimum Reading freezing Hold Power Supply 1 x 9V Battery (006P, NEDA1604 or IEC6F22) (Battery Not Included) Auto power off Automatically power off after approx. 15 minutes of inactivity Package List: 1 x Anemometer (Battery Not Included) 1 x Probe 1 x English Manual 1 x Box