Describe: Strong vertical airflow keeps you coolThe strong airflow of our collar fan can quickly cool you down in the hot summer, and the air outlet guarantees that your face and neck are always kept cool, keeping you dry and comfortable all day long SUITABLE FOR MOST OUTDOOR OCCASIONS The ultra-thin shape allows you to wear it easily at any time anytime, anywhere, a must-have for beach, camping, hiking, travelling, picnic, park, concert or sports game More working time longOur portable fans are equipped with a built-in 400mAh high-quality lithium rechargeable battery, any USB port devices can be used for charging, such as adapters, computers, power banks and chargers. car. Easy and safe operationThis collar fan has three wind speeds (low, medium, high). When not in use, you can keep it safely in your bag or pocket without worrying about accidentally opening it. Product Parameters: Size of the product: 140x80x35mm Color box size: 143x38x80MM Battery capacity: 2000mAh Product material: ABS + silicone + aluminum alloy Included: 1 fan