CALL: A.WIHARTA 081294124885 085778084789 087784022201   Info Produk Air Velocity Range Resolution Accuracy m/ s ( meter per sec) 1.1 ~ 30.0m/ s 0.01 m/ s ± ( 3% + 0.30 m/ s) kph ( kilometer per hours) 0.8 ~ 108.0 km/ h 0.1 km/ h ± ( 3% + 1.0 km/ h) fpm ( feet per minute) 80 ~ 5900 ft/ min 1 ft/ min ± ( 3% + 40 ft/ m) mph ( miles per hour) 0.9 ~ 67.0 mph 0.1mph ± ( 3% + 0.4 mph) knt ( nautical mph) 0.8 ~ 58.0 knots 0.1 knots ± ( 3% + 0.4 knots) Sampling Rate : 1 reading per second Sensor : Fan Automatic Power Off : 15 minutes Operating Temperature : 0 ~ 50° C ( 32 ~ 122° F) Storage Temperature : -10 ~ 60° C ( 14 ~ 140° F) Operating Humidity : < 80% RH Storage Humidity : < 80% RH Operating altitude : 2000 meters ( 7000ft) maximum Power : 9V battery Size : 165 x 54 x34mm Weight : ± 139g Standard Accessories : battery, instruction manual, warranty card, certificate of product conformance