F-59 Portable USB 2.0 / 18650 Li-ion Battery Rechargeable 4-Blade Fan - White
Output power: 4W energy-saving and environmentally-friendly with long runtime over 6.5 hours; Multi-functional circuit integration design including three gears shift circuit charging circuit and protection circuit; Small size portable and convenient to use; With ABS shell 2mm thickness solid; Popular with travelers and students; Can be charged via home power supply computer cell phone power bank or car charger