Features:1. This product has unique structure and novel style2. Intelligent control, complete functions, simple operation, stable performance and safe use3. Simple and generous appearance, firm structure, small size, light weight, and easy to carry. It is a companion for travel and outdoor sports.4. 3 wind speeds: three gears adjustable, first gear breeze, second gear natural wind, third gear strong wind Specifications:Fan blade: no leaf designMaterial: ABS+TPROutput power: 4.5WInput current: DC 0.5A /1AOutput voltage: DC5V-9VInput voltage: DC5VPower supply mode: battery storage (a lithium battery), USB power supply4000mAh working time: about 6 hours (1 level) about 5 hours (2 level) about 4 hours (3 level)Battery capacity: 4000mah(Battery included )Charging time:4 hours(4000mah)Working time:4-6hours (4000mah) Product size: 19.7*19.8*6cmColour:Green /WhitePackage Included:1 * Hanging Neck Fan1 * Usb Cable