REED Instruments LM-81AM Compact Vane Anemometer Air Velocity Range: 80 to 5910 fpm; 0.4 to 30.0 m/s; 0.9 to 67 mph; 1.4 to 108 km/h; 0.8 to 58.3 knots Easy to operate, compact design Min/Max and data hold functions Low battery indicator and auto shut off Includes wrist strap and battery