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Product Name: Car Seat Fan Product color: Black White Product size: 175 * 75 * 34mm Product gross weight: 119g Color box size: 103.5 * 179 * 36.5mm Packing quantity: 100pcs Whole box weight: 18.8Kg Outer box size: 39 * 39 * 56cm Input voltage: 5V Input current: 2A Input port: Type-c Electricity mode: Plug in use, does not include battery Product Material: ABS Execution standards: GB.47061 Product accessory details: Host * 1, 1.5-meter Type-C power cord * 1, instruction manual * 1 Usage: The product is designed with Velcro fixed on both sides to prevent jolting and movement during use; In the appropriate position on the backrest of the car seat, stick a Velcro to fix it, and press the switch key after power on to use it. Fan gear: low, medium, high, a total of three levels; Short press the button to switch gears: cycle through "first gear, second gear, third gear, shutdown gear" in sequence Fan speed: 1st gear: 3000RPM; 2nd gear: 3800RPM; 3rd gear: 4500RPM Fan speed: 1st gear: 2.6m/s; 2nd gear: 4.0m/s; 3rd gear: 5.1m/s