The strong airflow of our necklace fan can quickly cool you down in the hot summer, and the air outlet ensures that your face and neck are always cool, and keep you dry and comfortable all day long! Our wearable fan is equipped with a built-in 2000mAh high-quality lithium rechargeable battery that can work for 3-10 hours after being fully charging. All USB port devices can be used for charging such as adapter, computer, power bank, and car charger. This neckband fan has three wind speeds (low, medium and high), one-button control, long press the power button for 2 seconds to turn on/off the small fan, and short press to adjust the air volume.When not in use,you can safely put it in your bag or pocket without worrying about opening it accidentally.