1. Size: The USB charging leaf less neck hanging small fan has a moderate size, making it easy to carry and use. 2. Charging method: The fan adopts USB charging method, which can be charged by connecting devices such as power adapters, computers, and mobile power sources, making it convenient and fast. 3. Vaneless design: Unlike traditional fans, this fan adopts a bladeless design, which generates airflow through the internal fan mechanism, making it safer to operate without obvious rotating blades and avoiding potential harm caused by traditional fans. 4. Hanging neck design: This fan has a hanging neck design, which can be hung around the neck to freely adjust the wind direction and wind speed, allowing users to enjoy cool breeze. 5. Multi speed regulation: This fan usually has a multi speed regulation function, and users can adjust the wind speed according to their needs to meet different needs. At the same time, the wind duct of the fan can freely adjust its angle, spreading a wider range of wind force. Product Name: Rotorcraft Hanging Neck Fan Product model: MF080 Material: ABS Color: White, Green Product size: 219 * 183 * 52mm/8.62 x 7.20 x 2.05 inches Single net weight/cross weight: 278g/369g Packaging list: instruction manual, data cable, certificate of conformity Input: DC5V/1A Power: approximate 5W Battery capacity: 2400mAh Three adjustable gears: -/2nd/3rd Charging time: approximately 4 hours and 20 minutes Usage time: approximately 6 hours 30 minutes/3 hours 20 minutes/1 hour 50 minutes Speed: approximately 6410 in first gear, 8800 in second gear, and 10820 in third gear Charging indicator light: red light Maximum wind speed: 5.5m/s Wind duct: retrievable and rotating Interface type: TYPE-C