Feature: 1. The display screen can display the maximum wind speed, flow rate and average wind speed (m/s, ft/min, km/h, mph). 2. Highly sensitive and accurate measurement provides rapid measurement for analyzing critical environmental conditions. 3. Its large LCD screen with high definition backlight can easily cope with various dark environments and is easy to read. 4. Digital anemometer supports data retention, automatic shutdown and date retention functions, you don't need data to be lost. 5. It has a wide range of application, which is suitable for flying kites, aviation planes, drones, sailing, fishing, hiking, shooting, etc. Specification: 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 . Package List: 1 x Anemometer (Battery Not Included)1 x Wind Speed Sensor1 x Manual 1 x Tool Box