4000mAh battery capacity Compared with other portable fans on the market, this model is equipped with a 4000mAh battery, supporting 5 to 20 hours of operation on a full charge. Battery life varies by speed setting: Speed 1 (20 hours), Speed 2 (15 hours), Speed 3 (5 hours). Portable/Desktop Fan This compact mini fan can be used as a handheld fan outdoors or as a desk fan on a flat surface in the office. The base includes a non-slip pad to keep the fan stable during use. USB Rechargeable The mini hand fan features USB charging and fully charges in approximately 3 hours. It is compatible with USB power sources such as wall chargers, car chargers, and computers. Easy cleaning and compact design Designed with a removable cover that detaches counterclockwise, this fan is easy to clean. Its small size makes it convenient to carry in a bag, ideal for commuting, travel, shopping, picnics, or office use. A practical companion for summer. Warm Tips 1. Before use or charging, ensure the anti-activation switch located at the bottom of the base is turned on. 2. The fan features one-button control. Short press to turn on, press repeatedly to adjust wind speed, and press again to turn off. Key features: - Battery capacity: 4000 mAh - Runtime: 5–20 hours (depending on fan speed) - 3 adjustable wind speeds - Fully rechargeable in 3 hours via USB - Removable cover for easy cleaning - Compact and portable for everyday use - Anti-activation switch prevents accidental start-up - One-button operation for simple control The portable fan is a convenient choice for outdoor use, travel, and daily commuting thanks to its compact size and reliable performance.