Features ERGONOMIC DESIGN: The thermal anemometer is ergonomically designed for a comfortable grip and incorporates a non-slip feature that makes the anemometer lightweight and easy to use. MULTI-FUNCTIONAL DISPLAY: The anemometer features a large 43 x 57 mm screen that simultaneously displays wind speed, wind temperature and wind volume with clear, backlit graphics that are easy to read, even in low light or nighttime conditions. MULTIPLE WIND SPEED UNITS: The handheld anemometer measures wind speed in a variety of units, including meters per second, kilometers per hour, feet per minute, miles per hour and knots, and is available in two flows rates CFM and CMM. SENSOR-BASED MEASUREMENT: Equipped with a sensitive sensor for accurate measurements. Simply remove the protective cover from the sensor head before use. EASY TO MEASURE: The probe can be extended to approximately 1000 mm and the handle is 130 mm long for high accuracy, excellent performance and easy measurement. Specification: Item Type: Thermal Anemometer Material: ABS, Stainless Steel Battery Mode: Lithium battery(Shipped with built in battery) Battery Capacity: 450mah Display: Approx. 43 x 57mm / 1.69 x 2.24in large LCD, dual function display Measurements: m/s, km/h, ft/min, MPH, Knots, ℃ / ℉, the Data hold Sampling: 0.8 seconds Operating Temperature: 0℃ to 50℃ (32 to 122℉) Operating Humidity: Less than 80%RH Package List: 1 x Thermal Anemometer 1 x Sensor  1 x Charging Cable  1 x Storage Bag  Package List 1 x Thermal Anemometer 1 x Sensor 1 x Charging Cable 1 x Storage Bag