Adopting a double motor double exhaust systems, combined with ergonomic 180° airflows vents, it has better cooling The built in LED display shows real time power condition, ideal for outdoor adventures, work, camping, or workouts Equipped with a 20000mAh battery, this neck fan provides up to 32 hours of continuous cooling on low speed The 5 speed works with aerodynamically air ducts for effortless comfortable, none complicated operations needed Combining waist airflows, neck circulation, desktop cooling, and portability power supply functions