Digital Anemometer 
This pocket-sized Anemometer has a lightweight low-friction ball vane providing high accuracy at high & low air velocity. The robust case incorporates a large easy to read display and wrist strap making it ideal for practically all conditions and uses. Measures Airflow. ﾕ Selectable m/s, fpm, mph, km/hr or knots. ﾕ Shock resistant low-friction ball vane. ﾕ Easy to use push button operation. ﾕ Data hold freezes current measured value. ﾕ Min/max memory since power on. ﾕ 18mm LCD display with function indicators � Supplied with instructions for use. � Calibration certificates available. � Requires 1 x PP3 9V Battery.