Made of fine quality material practical easy to operate and use wide application range has a long service life. Features: Measurement of wind speed air and temperature. Wind cold indicator. It has a low battery indicator and data hold function. Switch wind speed units (mph km/h m/s ft/min knot). Real-time measurement of wind speed and average wind speed. Measurement of maximum wind speed and minimum wind speed. Switch between Fahrenheit and Celsius unit. Timed automatic shutdown (automatic shutdown after 10 mins of no button operation). With LED light for easy use in dark environments. Widely used in electric power meteorology iron and steel petrochemical energy saving and other industries. And it is also suitable for sailing heating ventilation air conditioning agriculture sea fishing industry all kinds of fan manufacturing the need for exhaust system industry and so on. Specification: Material: ABS Color: black black+red (optional) Units: CFM CMM ℃/℉ mph km/h m/s ft/min knot Wind velocity measurement: Measurement range: m/s: 0~30 ft/min: 0~5860 knot: 0~55 km/h: 0~90 mph: 0~65 Resolution: m/s: 0.01 ft/min: 1.968 knot: 0.019 km/h: 0.036 mph: 0.022 Threshold: m/s: 0.3 ft/min: 60 knot: 0.6 km/h: 1 mph: 0.7 Accuracy: m/s: ±5%±0.1 ft/min: ±5%±20 knot: ±5%±0.2 km/h: ±5%±0.4 mph: ±5%±0.2 Wind flow range: CMM: 0-999900m³/min CFM: 0-999900ft³/min Area: CFM (FT³/MIN): 0.001-9999 CMM (M³/MIN): 0.001-9999 Wind temperature measurement: Battery: 1 * 9V battery (not included) Temperature sensor: negative temperature coefficient resistance Operating temperature: -10℃~+45℃ (14℉~113℉) Operating humidity: less than 90%RH Storage temperature: -10℃~+50℃ (14℉~122℉) Current consumption: about 6mA Item size: 165 * 85 * 39mm / 6.5 * 3.3 * 1.5in Item weight: 148g / 5.2ounce Package size: 175 * 125 * 50mm / 6.9 * 4.9 * 2.0in Package weight: 240g / 8.5ounce Package list: 1 * Anemometer 1 * User Manual