Features :The fan's maximum speed is 3200 RPM , enough for personal use to keep you cool . Low and medium Settings are decent and super quiet to ensure the smooth flow of air . Fans work by increasing air flow , reducing noise , and allowing you to sleep in peace .The outdoor fan USES a 2200mAh improved battery ( model 18650 ), which can work for 3 - 13 hours when fully charged . The speed of this portable table fan can be adjusted according to your needs between low , medium and high .Pack the small ( 7x7x3in , weighs 13 ounces ) and elaborate rechargeable fan into your bag and you & 39 ; ll have no problem carrying it around for outdoor activities . In addition , if you need a portable fan to create flow in every corner of your house , it can also be used indoors .The Blue interior LED lights are injected into the fan , making it more advantageous and attractive to look at . Side lights are very bright and useful in dark areas or when there is a power failure . It is the perfect companion for any outdoor planning and travel purpose .This fan runs at 5 v DC , which is USB standard . You need to plug the fan into a USB port to get power , such as a USB port , computer , laptop or power pack . The hand - held fan can operate at 110 or 220 volts and can be transmitted around the world .Specification :Material : ABS + electronic componentsSize : 20 x20x6 . 6 cm / 8 x8x3inchPower mode : USBSpeed gear : three gearHow to shake your head : up and downTiming function : no timingDB : 30 . 3 dBPower : 4 wCharging cable : Micro 5pin USBPackage Includes :1 piece Fan1 piece USB cable1 piece specification