1Highly sensitive and accurate measurement, providing rapid measurement for analyzing environmental conditions 2Support automatic closing save and date retention function, data will not be lost, more convenient 3Various functions, it can measure and display the maximum wind speed, flow velocity and average wind speed 4Large LCD screen display, clear imaging, with backlight function, convenient to use in dark environments 5Battery powered, long battery life, easy and quick to replace the battery, convenient for daily use Item Type:Anemometer Model: 8901+ Material: ABS Battery: 3 x 1.5V AAA(battery not included) Uses: flying kites, aviation planes, drones, sailing, fishing, hiking, shooting, etc Wind Speed Unit Range Minimum Accuracy Starting Point Accuracy m/s 0~45 0.01 0.3 3%0.1dgts ft/min 0~8800 1.9 60 3%10dgts knots 0~88 0.02 0.6 3%0.1dgts km/hr 0~140 0.03 1 3%0.1dgts mph 0~100 0.02 0.7 3%0.1dgts Tempure Unit Range Accuracy Value Accuracy 0~+45 0.2 2 32~113 0.36 3.6 Working Temperature 0~+4532~113 Working Humidity 40%RH~85%RH Storage Temperature -10~+5014~122 Storage Humidity 10%RH~90%RH1 x Anemometer(battery not included) 1 x Wind Speed Sensor 1 x Manual 1 x Tool Box