CENTER-330 air temperature anemometer features: dual display handheld instrument to measure Temp (Split) 0.6 ~ 20m / s to maintain / maximum / minimum / average function. Auto power off CENTER-330 air temperature anemometer Specifications | parameter range 0.6 ~ 20m / sec, 120 ~ 4000 ft / min Temperature: -20 ° C ~ 60 ° C; -4 ° F ~ 140 ° F resolution wind speed: 0.1 m / s Temperature:? 0.1 ° C / 0.1 ° F Wind Speed ??Accuracy:? ± (2.5% + 0.2m / s) Temperature: -20 ~ 60 ° C ± 8 ° C (± 1.6 ° F) in m / sec, ft / min, km / hr, knots, ° C / ° F 9V battery meter size: 186x64x30 mm, handle: 289 (L) x15 (D), the wind wheel:. 60.5mm Dia Weight 362g Standard Accessories Operation Manual , batteries, wind wheel probe, carrying case