Product Features ❃【LARGE BATTERY CAPACITY OF 4000mAh + UP TO 23 HOURS OF USE】Built-in battery allows for more convenient charging and use. Larger capacity of 4000 mAh provides 5-23 hours of cable-free use. ❃【STRONG SOFT AIRFLOW + ADJUSTABLE 3 SPEEDS】Provides 3 speeds that can be adjusted through pressing the power button. Soft wind but...