Features: USB rechargeable Fan Working time lasts about 4 hours USB charging cable provided Adjustable Speed: There are 3 Adjustable speed levels Portable Powerful yet quiet Removable Base Specifications: Material: ABS/PP/Electrical components Size: Approx. 208 x 95 x 38 mm Battery capacity: 1200mAh Battery voltage: 3.7V Charging voltage: 5V/380mA Use power: 1.2-3W