Handheld Anemometer Portable Wind Speed Meter CFM Meter Wind Gauge with LCD Backlight for Weather Data Collection Outdoors Sailing Surfing Fishing Specification: Material: ABS Color: black+red 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 Range: CFM (FT³/MIN): 0-999900 CMM (M³/MIN): 0-999900 Resolution: CFM (FT³/MIN): 0.001-100 CMM (M³/MIN): 0.001-100 Area: CFM (FT³/MIN): 0.001-9999 CMM (M³/MIN): 0.001-9999 Wind temperature measurement: Measurement range: ℃: -10℃~+45℃ ℉: 14℉~113℉ Resolution: ℃: 0.1 ℉: 0.2 Accuracy: ℃: ±2℃ ℉: ±3.6℉ Battery: 1 * 9V battery (not included) Temperature sensor: negative temperature coefficient resistant 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