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Summer Working Wearable Fan Cooling Jacket Vest Fan Small Fan. Customizable Logo: Supports custom logo printing on the fan jacket. Long Lifespan: Durable design with a lifespan of up to 5000 hours. Low Noise Operation: Operates quietly with noise levels ranging from 37dB to 46dB. Adjustable Wind Speed: Features 3 adjustable wind speed levels via USB switch. Compact Design: Lightweight at 95g with dimensions of 105mm diameter and 45mm thickness. Versatile Power Options: Compatible with 5V USB power banks or 7.4V/12V batteries. Multiple Certifications: Products certified with RoHS, CE, UL, SGS, and UN38.3. OEM/ODM Services: Offers flexible customization including samples, designs, and full customization.