Product Rechargeable 500 mA battery,very lightweight, good portable to anywhere.1-3 hours working time depend on different speeds.The mini USB hand fan can be charging from a computer ,a power bank ,a USB charger and power supply. Ideal face fan for yoga, running and office.It is really a battery portable fans.This is a multi-functional handheld Mini rechargeable LED electric fan. You can use it as a great summer fan, and also as a self timer light and flashlight when the light is dark. It's very practical when walking running and camping at night When you need makeup, this small face fan can be used as an eyelash fan.It is a lash fan dryer.Perfect for indoor and outdoor use, the personal fan can produce natural wind to keep you cool when reading, doing sports, waiting in line and traveling , it would be your best partner in such hot summer.More Information About This Mini Portable FanFan speed: 3.5m/s-5m/sBattery capacity: 500MAHMotor speed: 2000 - 5000rpmService time: 1-3HCharging mode: USBPackage Contents:1 x Mini Led Fan1 x Charging Cable (without plug)