Specification: Product name: Leafless hanging neck fan Product weight: 9.1 OZ Battery capacity: 3000 mAh Voltage working range: 5 V Power: 5 W Duration: 4-16 hours Interface type: USB-C Wind speed: 5 files Short press to turn on the 1st gear, short press again to the 2nd gear, 3rd short press to the 3rd gear, 4th short press to the 4th gear, 5th short press to the 5th gear to produce wind Feature This portable bladeless neck fan can last up to 8-12 hours. 5 levels of wind power are adjustable. Adopt 360-degree all-round air supply mode, three-dimensional air outlet, up and down air outlet, double the coolness again, solve the problem of no wind at the back of the neck, and bring everything. Made of skin-friendly silicone material, it will not cause discomfort when it directly contacts the skin. The neck hanging design is very convenient, no matter you are sitting or walking, it will not bring any burden, and you can travel light. The noise is less than 36 decibels and works silently.