Specifications Model: FS40 Wind Speed: 5.4 m/s (17.72 ft/s) Blade Diameter: 16 inches / 40.64 cm Maximum Airflow: 1847 CMF Battery Capacity: 15600 mAh Full Charge Time: 2.5 hours Fan Operating Voltage: 12V Main Material: Carbon Steel Product Weight: 8.02 lbs / 3.64 kg Product Dimensions: 20.08 x 7.68 x 18.70 inches / 510 x 195 x 475 mm Package Content 1 x Fan 1 x Charging Adapter 2 x Plastic Knobs 1 x Instruction Manual