This practical anemometer is portable and useful for measuring Air Velocity (wind speed) and, it also can show you the ambient. LCD display with backlight, it is easy to read value at night. Features: This portable anemometer is a helpful measuring meter for wind speed and measurement. Wind speed unit is switchable: ms, kmhr, knots or mph. unit is switchable: Celsius(℃) or Fahrenheit(℉). Maximum, minimum and average Air Velocity value measurement function. Data holding and the current wind speed selection. LCD display with backlight ONOFF, easy for reading. Low battery indication, automatic & manual power off function. Compact and, convenient to hold and carry. Specifications: Brand Name: SMART SENSOR Color: Black Material: ABS Air Velocity : 0.3～30ms, 0.6～58knots; 1～108kmh; 0.7～67mph Air Velocity Unit: ms, Knots, kmh, mph Resolution: 0.1ms; 0.2knots; 0.3kmh; 0.2mph Accuracy: ±5%rdg±0.1 : 0～50℃ / 32～122℉ Resolution: 0.1℃ / 0.1℉ Accuracy: ±2℃ / ±3.6℉ Operating : 0-50℃ (≤80%RH non-condensing) Storage : -10-60℃ (≤90%RH non-condensing) Power Supply: 3* 1.5V AAA Batteries (Not Included) Item Size: 16.5 * 5 * 2.7cm / 6.50 * 1.97 * 1.06in Item Weight: 81.7g / 2.88oz Package Size: 22 * 14.5 * 3.2cm / 8.66 * 5.71 * 1.26in Package Weight: 121g / 4.27oz Package List: 1 * Digital Anemometer 1 * User Manual This portable anemometer is a helpful measuring meter for wind speed and temperature measurement. Wind speed unit is switchable: m/s, km/hr, knots or mph. Temperature unit is switchable: Celsius(℃) or Fahrenheit(℉). Maximum, minimum and average Air Velocity value measurement function. Data holding and the current wind speed selection.