1. The clip fan supports 360° rotation makes you get airflow from different directions so that keep you cool in any angle.
2. The battery fan built with professional high performance brushless motor with faster speed, strong wind and low noise (below 57dB).
3. Built-in 5000 mAh large capacity batteries provide 6-20 working hours duration according to the different 3 speeds; 3-4 h is enough to finish charging if given 5V/2A adapter(not included) while other similarities need 5-6 hours.
4. This small fan runs on 5 volts DC, which is the USB standard. USB charging via a computer, laptop, mobile power, USB charger, mobile phone adapter, car charger, etc.