NewSilkRoad 6.5W Outdoor Portable Hang Waist Recharging Fan 3 Speed with18650 Lithium-Ion Battery and USB Cable MINI BATTERY-OPERATED OR USB POWER OPERATED FAN.Portable stay Cool at anywhere whatever at home or outdoor.It is also can work with power bank while no battery in it. THE UNIQUE WAIST DESIGN:6.5w strong wind cool your waist. Good for the outdoor worker in the hot summer. HIGH QUALITY BATTERY. 2200mAh 18650 rechargeable battery.Working hour 1-4 hours depend on your speed. 3-SPEED.More speed choice to meet your need.Energy-saving,whisper-quiet operation motor. Net weight:184g