8909 High Accuracy Wind Speed Tester Handhled Digital Anemometer for Sailing Fishing Hiking Item Type: Anemometer Model: 8909 Material: ABS Battery: 3 x 1.5V AAA (Battery Not Included) Uses: flying kite, aviation plane, drone, sailing, fishing, hiking, shooting, etc. A. Wind Flow Range Unit  Range  Accuracy  Range CFM(FT^3/MIN) 0~999900 0.1-100 0.001-9999 CMM(M^3/MIN) 0~999900 0.1-100 0.001-9999 B. Wind Speed Range Unit  Wind Speed  Accuracy  Critical Point  Accuracy m/s 0~45 0.1 0.3 ±3%±0.1dgts ft/min 0~8800 19 60 ±3%±0.1dgts knots 0~88 0.2 0.6 ±3%±0.1dgts km/h 0~140 0.3 1 ±3%±0.1dgts mph 0~100 0.2 0.7 ±3%±0.1dgts C. Wind Temperature Unit  Range  Accuracy  Accuracy ℃ 0~45 0.2 ±2 ℉ 32~113 0.36 ±3.6 Ambient Temperature 0℃~+45℃(32℉~113℉) Environment Humidity 40%RH~85%RH Storage Temperature  -10℃~+50℃(-14℉~122℉) Storage Humidity 10%RH~90%RH