?Customer Service & ONE YEAR Warranty?LEMOISTAR offer one year warranty for any defective fan. Please feel free to contact us if you meet any problem. We will get back to you within 24 hours. ?Compact Size & 310 °Adjustable?4.8*7.0*4.3 inch mini size and 0.52lb lightweight. This portable fan is easily carried in bag when you go out or travel and perfect for office, home, dorm, camping, library use, etc. The USB fan head is able to tilt from 0 to 310 degree in the vertical direction, you can rotate it up and down if the wind doesn’t hit your intended area. ?Multiple Compatibility USB-powered?This mini table fan is powered by a 3.9 ft USB cable, compatible with PC, power bank, power adapter(not included), car charger and other devices with USB output. (NOTE: the fan is powered by USB devices only, it does not come with a rechargeable battery). ?Strong Airflow & Ultra Quiet? The USB desktop fan built-in pure copper brushless motor and circulating fan blades, this make the fan work ultra quiet and move a decent amount of air to cool you down quickly. Feel the blast of the strong airflow from about 10 ft away. The minimum noise of fan is close to 10dB. Even at higher speeds it's still more quieter than any other fan. ?Small but Mighty?The LEMOISTAR USB desk fan is small but mighty(Size: 4.3*6.7*2.0 inches). You can pack it in your bag to take it anywhere. It doesn’t take up a lot of space and keep you cool all the time. And this small fan puts out as much cool air as a larger fan would. You will be amazed by it’s power. Perfect desk fan for office and home.