ABOUT THIS PRODUCT MULTI-USE: The mini USB fan is easy to carry and store, and is a true hands-free neckband fan for indoor and outdoor activities A must-have for summer, walking, hiking, outdoor festivals, viewing events, excursions, festivals, commuting, and school. It can be used as an electric fan in summer. You can enjoy clean and comfortable air. Semiconductor cooling technology: High technology leads the new trend This personal fan adopts semiconductor cooling technology. The current generated by the semiconductor cooling chip produces a temperature difference, which can instantly cool down within two seconds. It provides cool air where you need it most and reduces the temperature of your personal space by up to 6 to 9 degrees. Adjustable Curved Structure: The soft silicone material has an adjustable curved structure, which provides comfortable neck protection and adjusts the size according to the unused neck circumference. The neck fan is as light and portable as earphones, hanging around the neck. The special handheld design allows you to free your hands and enjoy the cool breeze while doing what you want. USB Rechargeable & Adjustable 3 Modes: The portable fan has a built-in 3000 mAh Li-polymer battery. The first mode is the breeze mode, the second is the light wind mode, and the third is the high wind mode. Whether you are working or shopping, you can work continuously for 3-11 hours. 45 Degree Rotation Design: Hands-free small neck dual fan can easily bring you extraordinary comfort. 45 degrees adjustable, allowing you to find the most suitable wind direction.