Description: 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'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 components Size: 20 x20x6. 6 cm / 8 x8x3inch Power mode: USB Speed gear: three gear How to shake your head: up and down Timing function: no timing DB: 30.3 dB Power: 4 w Charging cable: Micro 5pin USB Package Includes: 1 piece Fan 1 piece USB cable 1 piece specification