Midnight Green Mini USB Fan with Rechargeable Battery, Quiet Portable Fan, for Cooling When Travel Clip, Outdoor, Indoor. Invention patent is idea of aircraft propulsion technology. The turboflower blade and the collective wind technology bring you cold air with less noise and energy consumption. Aromatherapy with magnetic design, easy to open thanks to the lever principle. After adding favorite fragrance, it can be easily installed by magnet. And your favorite fragrance taste will be brought to you by the future cool breeze to make life more fun. This battery-powered mini fan has a built-in 2000mAh battery with power-saving technology. energy. This USB fan blows cold air continuously for 6 hours. This small battery-powered fan is portable and cute, with built-in dynamic balance technology that keeps the fan comfortable when the fans are blowing cold air. It supports 3 adjustable wind speeds and is suitable as a table fan or as a neck fan in the umbrella.