GaGa MILANO Mini USB Fan Handheld Desk adjustment angle Fan Rechargeable Portable Personal Cooler Fan Regulating Wind Speed for Office Home Outdoor (Green) Perfect Wind: Open the sliding switch, wind speed will be adjustable from small to large. 2000mAh rechargeable 18650 lithium battery for power saving, working with universal 5V USB outlet Fan bracket can pull back to adjust the overall fan angle, increasing comfort. mall fan,can be held by hand, fitting perfect on the table or other small places for intense personal cooling or energy-saving air circulation. Working time: 2.5 - 5.5 hours,suitable for outdoor sport and travelling cooling