Rechargeable Fans Portable & Foldable Handheld Mini Fan Battery Operated Cooling Fan with 18650 Battery, Electric Personal Handy Fans for Desk, Home, Travel (Black) Can be used as a desk fan, clip fan, portable hand fan, umbrella fan. The advanced power management technology provides a variety of power supply. Use USB directly or battery-powered Free to turn down or turn up air volume with the stepless speed technology. Efficient power and conversion circuitry can minimize the loss to save energy. A hand held mini fan for cooling. 18650 international standard high-capacity battery provides long life and strong power output. Blows smoke and smells away. Suitable for traveling in hot weather.