1. Wind speed measurement range:- 0.80-40.00m/s- 1.40-144.00km/h- 1.30-131.20ft/s- 0.80-77.70Knots- 0.90-90.00mile/h- 78-7874ft/m2. Display: 9999 counts3. Applicable to wind speed measurement in wind energy, meteorology, industry, agricultural hydrology and water conservancy, environmental protection, highways, airports and ports4. Eight blades, low-friction bearing technology, wider blade diameter measurement, more accurate and more sensitive response5. 0~99990.01CFM (CMM, CMS) wind volume measurement range resolution6. Support backlight display, easy reading and measurement in strong light and at night7. Long-lasting battery life, powered by three AA batteries (not included)8. Weight: 137g9. Dimensions: 197x60x33mmSpecification: Package Weight One Package Weight 0.30kgs / 0.66lb One Package Size 24cm * 13cm * 6cm / 9.45inch * 5.12inch * 2.36inch Qty per Carton 40 Carton Weight 14.60kgs / 32.19lb Carton Size 48cm * 26cm * 48cm / 18.9inch * 10.24inch * 18.9inch Loading Container 20GP: 445 cartons * 40 pcs = 17800 pcs40HQ: 1033 cartons * 40 pcs = 41320 pcs