Features: Innovative design: The ramp air guide system, like natural wind, is cool and comfortable, and refuses to blow directly. Ergonomic design, light weight and no sensation when worn for a long time. Fan blade and wind holes are designed to cut the air more effectively and feel the cool wind. Fan blade all-inclusive design, suitable for long and short hair, do not worry about sucking hair. Dust-proof structure, unique opening design to avoid dust accumulation on fan blade. Specifications: Material: Plastic Color: Blue/Green/White Working Voltage: 5V/2A Power: 9W Charging Time: Approximately 3.5 Hours Working Time: Approximately 1.5-10 Hours Charging Interface: Type-C Battery Capacity: 4000mAh Control Method: Buttons Size: Approx. 7.36x4.67x2.07inch(187x118.5x52.5mm) Package Includes: 1 Set Hanging Neck Fan note: Please allow 1-2cm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.