Mini Thermo-Anemometer measures ft./min., mph, m/sec., km/hr., knots (kt) and Beaufort force. It takes wind speed in a variety of measurements with a selectable averaging function of 5-, 10- or 13-sec. intervals. Minimum speed: 100 ft./min. Maximum speed: 5500 ft./min. Data hold and auto shut-off functions. Temperature range: 0°–122°F. Water-resistant housing allows meter to float. Drop tested to 6'. 5-1⁄4"H x 2-3⁄4"W x 3⁄4"D.