Tower Type Desktop Shaking Head Fan USB Charging Office Home Fan Vertical Tower Fan Mini Small Fan Features: Super Silent Conditioning New Upgrade I Turbine Supply Design Simulates Natural Wind to Keep You Cool All Summer Super 10 meter engine duct is cost free and adopts imported quad core permanent magnet motor, with 8 times the super strong power and strong wind power to Convective circulation, strong cold , sudden drop of 20 degree C in seconds, turbo compressed cold , 8 times power, strong eNough wind to cool down The engine turbocharged turbine techNology provides cooler output, and the compressed is the type of cold The four core permanent magnet motor has almost No Noise. It uses a permanent magnet motor with a soft supply of 20 decibels and is as quiet as a leaf supply from any angle, New Energy high capacity battery, 24 hour ultra long , wherever it blows down Product Description: size:12.5*12.5*26.5cm / 4.92*4.92*10.43inch Input voltage 5V Charging input 3.7V Gear adjustment, 4th gear Super Silent Conditioning New Upgrade I Turbine Supply Design Simulates Natural Wind to Keep You Cool All Summer Super 10 meter engine duct is cost free and adopts imported quad core permanent magnet motor, with 8 times the super strong power and strong wind power to Convective circulation, strong cold , sudden drop of 20 degree C in seconds, turbo compressed cold , 8 times power, strong eNough wind to cool down The engine turbocharged turbine techNology provides cooler output, and the compressed is the type of cold The four core permanent magnet motor has almost No Noise. It uses a permanent magnet motor with a soft supply of 20 decibels and is as quiet as a leaf